Some standard content:
Military Standard for Electronic Industry of the People's Republic of China FL 0182
SJ20910--2004
General specification for powder spraying coating
General specification for powder spraying coating2004-10-25 Issued
2004-12-30 Implementation
Before approval by the Ministry of Information Industry of the People's Republic of China
This specification is a supporting standard for the three-proof standard system for military electronics. Appendix A of this specification is a normative appendix.
This specification is proposed by the Technical Committee for Process Standardization of Electronic Industry. The Technical Committee for Process Standardization of Electronic Industry of this specification is the author of this specification.
The drafting unit of this specification: the 20th Institute of China Electronics Technology Group Corporation. The main drafters of this specification: Zhang Juan, Miao Feng, Cheng Xiangyu. KAONiKAca=
SJ20910--2004
General Specification for Powder Electrostatic Coating
This standard specifies the technical requirements, test methods and inspection rules for powder electrostatic coating of metal parts of electronic products. This standard is applicable to the decorative and protective coating of thermosetting powder coatings on the surface of metal parts of electronic products. 2 Referenced Documents
SJ 209102004
The relevant clauses in the following documents are referred to by title. Refer to the referenced documents by date or edition. Any subsequent revisions (excluding errata) are hereby requested to discuss the possibility of using the latest version of the standard. For undated references General preparation method GB/T 1727 Paint film GB/T 1732 GB 1740 Determination of mould impact resistance GB/T 1764 Paint film resistance to moisture and heat GB/T 1771 GB3186 GB/T 6739 GB/T674 GB/T 6802 GB 9286 GB/T 9753 GB/T 9754 The latest version applies to this specification Salt penalty is Paint film hardness Circular sample auxiliary 2001 Iron and steel parts before painting Paint film scratching 8 Determination of 260% 85″ mirror gloss of varnish and varnish, excluding gold-colored paint film GB/T 9761- Color comparison of paint and varnish GB/T 11186.2- GB 14773—1993 Measurement method of coating color Part 2: Color measurement Safety regulations for electrostatic spray guns and their auxiliary devices Safety regulations for painting operations - Powder electrostatic spraying GB/T 15607—1995.
GJB 150.5-1986, Environmental test height for military equipment 4NTGJB150.10-1986 Environmental test method for military equipment JB/T7504—1994 Technical conditions for electrostatic spraying equipment SJ1276 Technical requirements for quality inspection of metal coatings and chemical treatment layers SJ/T10674 General technical conditions for coating 3 Requirements
3.1 Material requirements
3.1.1 The selected powder coating shall comply with the technical standards and requirements of the relevant materials. The powder coating shall be inspected and qualified and have a certificate of conformity. When necessary, an instruction manual and precautions shall be attached. 3.1.2 The environmental conditions and time of use of the material shall comply with the technical requirements of the material. 3.1.3 The receiving department has the right to inspect the powder coating according to the provisions of the standard ：If the quality is found not to meet the standard technical requirements, the supply and demand parties shall re-sample and re-inspect according to GB3186. If it still does not meet the standard requirements, the product is unqualified and the receiving department has the right to return the product.
3.2 Surface quality requirements for workpieces to be sprayed
The surface of metal products is not allowed to have burrs, nodules, molding sand, welding slag and welding spatter, oil stains, hungry spots and other defects that affect the decorative or protective quality.
3.3 Workpiece pre-treatment quality requirements
3.3.1 Unless otherwise specified, the quality requirements for degreasing, rust removal and chemical rust removal shall comply with the requirements of SJ/T10674 for degreasing quality level 1, and the rust removal quality level shall not be greater than 2.3.3.2 Iron and steel parts that require phosphating before spraying shall comply with the provisions of Chapter 4 of GB/T6807. 3.3.3 For aluminum parts that require chemical conversion film treatment before spraying, the chemical conversion film should have a certain thickness. The thickness of the chemical conversion film should be controlled within the range of 200mlg/m2~~300mg/m2 (determined by weight method). 3.3.4 The quality of workpieces that undergo chemical treatment or electroplating should comply with the quality requirements in SJ1276. The heat resistance of the metal coating and chemical treatment layer should meet the requirements of powder electrostatic spray curing temperature and time. 3.3.5 When the casting is to be painted, it should be pre-heated and baked for a sufficient time to ensure that the residual moisture and other volatiles in the tiny gaps and defects on the casting are fully removed.
3.3.6 Visually inspect the painted parts that have undergone surface pretreatment again and eliminate the defects and defects found. 3.3.7 Use purified compressed air or a metal brush to remove the residues remaining on the substrate surface in the above process. 3.3.8 After surface pretreatment, powder electrostatic spraying should be carried out within the time specified in the process document. If spraying cannot be done in time for some reason, effective measures should be taken to prevent the quality of pre-treatment from decreasing. If the treatment quality is found to be not in compliance with the regulations before spraying, it should be re-processed to make it meet the requirements. 3.4 Spraying equipment and safety requirements
Powder electrostatic spraying equipment should meet the technical requirements of JB/T7504-1994. Use an oil-free air compressor and an air dryer to ensure that the compressed air for powder supply is oil-free and water-free. The safety of the powder electrostatic spraying process should meet the requirements of GBT15607-1995 and GB14773-1993.
3.5 Spraying process requirements
3.5. tShielding treatment
For the parts that are not sprayed, shielding treatment should be performed before spraying. 3.5.2 Preheating
For the workpieces that require preheating, the preheating temperature is determined according to the temperature recommended by each powder coating manufacturer. The preheating temperature should be slightly higher than the melting temperature of the plastic powder coating. The preheating time should be determined by the size and thickness of the workpiece. The preheating temperature of the workpiece with a large surface area should be 30℃~50℃ higher than the melting temperature of the plastic.
3.5.3 Coating
: 3.5.3.1 When spraying, the output voltage range should be selected according to the size and geometric shape of the workpiece. Coating should be completed in one operation to ensure that the coating reaches the required thickness and uniformity, and avoid uneven coating thickness and color difference. 3.5.3.2 In order to maintain a good "static adsorption" effect, the grounding hook should be deplasticized after spraying for a period of time. 3.5. 4 Coating curing
The curing temperature and time should be carried out in accordance with the process regulations. Under the same curing conditions, products with the same batch number and the same series should use powder coating produced by the same batch number to avoid color difference. 3.5.5 Rework of defective coating
Workpieces with coating defects are allowed to be re-coated and cured after the surface is polished evenly. For workpieces that cannot be reworked by the above method, the coating shall be removed with a paint stripper, the surface shall be re-treated, and the coating shall be cured according to the requirements of 3.5. 3.6 Performance requirements of coating
3.6.1 Appearance of coating
When inspected according to the provisions of 4.2.1, the appearance of the coating shall be neat, smooth, and free of bubbles. Slightly uniform orange peel is allowed. For art lip coating, the texture shall be clear and the distribution shall be relatively uniform. Mechanical impurities and larger particles are not allowed. KANiKAca
3.6.2 Gloss of coating
SJ 209102004
When inspected according to the provisions of 4.2.2, the gloss value of the coating shall be consistent with the requirements of the contract or design documents. For high-gloss products with a gloss value greater than 80 gloss units, the allowable deviation shall not exceed ±10 gloss units, and the allowable deviation for other products is ±7 gloss units. 3.6.3 Color and color difference of coating
When inspected according to the provisions of 4.2.1, the color of the coating shall be basically consistent with the selected sample or color plate. If measured by instrument, the color difference E between the coating of single-color powder and the standard color plate shall not exceed 1.5. The color difference △E between the same batch of products shall not exceed 1.5. 3.6.4 Thickness of coating
According to 4.2.When measuring the thickness of the coating according to the 3 standard, the thickness of the coating should meet the requirements of the design and process documents. The maximum peripheral thickness on the coating surface should generally not exceed 120μ, and the minimum local thickness should not be less than 40μ. Some parts have complex shapes, and some surfaces (such as internal angles, transverse grooves, etc.) are lower than the specified values, but the bottom exposure phenomenon is not allowed. 3.6.5 Hardness of coating
When measured according to the provisions of 4.2.4, the hardness of coating should be 3.6.6 Adhesion of coating
When measured according to the provisions of 4.2.5
3.6.7 Impact resistance of coating
When measured according to the provisions of 4.2.6
3.6.8 Cupping test
When tested according to the provisions of 4.2.7
3.6.9 Bending resistance
When measured according to the provisions of 4.2.8
3.6.10 Acid resistance of coating
When measured by cross-cut test, it should be sent to the U~1 level in the inspection result classification table of GB9286
38.
The coating should not have peeling and color cracking, but fine wrinkles are allowed at the concave surface. After the cupping test of the plate with a radius of curvature of 3mm and bending 180°, the coating shall be tested according to the provisions of 4.2.9. 3.6, 11 Mechanical resistance of the coating shall be tested according to the provisions of 4.2.10. 3.6. 12 Solvent resistance. The color and color of the coating shall not change significantly after testing according to the provisions of 4.2.11. 3.6.13 Temperature resistance. Test according to the provisions of 4.2.12. 3.6.14 Moisture and heat resistance of the coating shall not change significantly, and the coating shall not be difficult to open or fall off.
The surface color, gloss and adhesion of the coating should be free of t
cracks and other phenomena.
The color, gloss and adhesion of the coating should not change significantly. According to the provisions of GB1740, the grade of INFORN
after 50mh of exposure according to the provisions of 4.2.13 should not be greater than grade 1.
3.6.15 Salt spray resistance of the coating
After 400h of the test according to the provisions of 4.2.14, the surface color, gloss and adhesion of the coating should not change significantly. According to the grade specified in GB1740, it should not be greater than Grade 2.
3.6.16 Mildew resistance of coating
After the test specified in 4.2.15, the surface length of the coating should not be greater than Grade 2. 3.7 Coating mark
Coating mark shall be in accordance with the provisions of Appendix A.
4 Test method
4.1 Preparation of test sample
4.1.1 Selection of test sample
Metal materials specified in GB/T1727 can be used, and the same materials as those to be coated can also be used. If there is no special provision, the size of the test sample shall be 70 mmX150 mm×1 mm.
4.1.2 Coating preparation
The temperature of substrate preheating and coating curing shall be selected according to the recommended value of the powder manufacturer. Keep the sprayed sample vertical and put it in an oven for curing. After leaving it at room temperature for 24 hours, the performance test can be carried out according to the operating steps in each test method. 4.2 Inspection items
4.2.1 Color, color difference and appearance of the coating
It shall be carried out according to the provisions of GB/T9761-1988. In general, the standard method is used to check against the standard color plate. Monochrome coating When cutting, use a colorimeter and measure according to the provisions of GBT11186.2-1989. 4.2.2 Determination of gloss of coating
Use a light tester to measure according to the provisions of GB/T9754-1988. When using a sample that meets the gloss requirements, it should be compared with the coating being tested under the same illumination conditions. 4.2.3 Determination of coating thickness
Measure according to the provisions of GB/F1764.
4.2.4 Hardness of coating
According to GB/T 6739 4.2.5 Adhesion of coating
The coating shall be tested in accordance with the provisions of GB9286-1998. Use the specified tool to scratch two groups of mutually perpendicular lines in the longitudinal and transverse directions on the surface of the coating, with six lines in each group, and the depth reaches the surface of the substrate to form 25 squares. Use the tape sticking method to check whether the coating has fallen off and conduct an assessment.
If there is no special requirement, the spacing between the grid lines shall be in accordance with the provisions of Table 1. Table 1 Spacing between the scribing lines
60~120
Spacing between the scribing lines
4.2.6 Impact resistance test method of coating
The test shall be carried out in accordance with the provisions of GB/T1732. The test plate thickness is 1.0mm and the state is H24 or -14 pure aluminum plate. The plate coating should be made on the same production line as the product. The punch diameter used is 16mm. The heavy hammer is freely dropped at the height of the cone to directly impact the coating surface (positive impact) to produce a pit with a depth of 2.5mm±0.3mm. Observe the changes in the pit and the silt layer on the edge. 4.2.7 Cupping test method
Test according to the provisions of GBT9753, and the test plate is prepared according to the method of 4.2.6. 4.2.8 Bending test method
Test according to the provisions of GB/F6742, and the test plate is prepared according to the method of 4.2.6. The size of the test plate is 150mm×50mm: 4.2.9 Acid resistance test method of coating
Immerse 23% of the sample area in a sulfuric acid solution with a concentration of 0.5mol and a temperature of 20℃~-25℃. Take it out after 24h, wash it with water, and place it at room temperature for 2h to check the acid resistance quality of the coating. 4.2.10 Alkali resistance test method for coating
2/3 of the sample area is immersed in a sodium hydroxide solution with a concentration of 0.1mol and a temperature of 20℃～25℃. After 24 hours, take it out, wash it with water, and place it at room temperature for 2 hours to check the alkali resistance quality of the coating. 4.2.11 Solvent resistance test method
Immerse a cotton swab in xylene solution and saturate it. Apply it on the test piece and keep it at 305. Then remove the cotton swab and rinse the sample with tap water (KAoNiKAca=
SJ20910--2004
, wipe it dry, and place it at room temperature for 2 hours. Use a fingernail to perform a scratch test. No obvious scratches should be produced. 4.2.12 Temperature change resistance test method
Perform the test in accordance with the provisions of GJB150.5-1986. Different high and low temperature values are selected according to different environmental conditions of the coating layer. The exposure time under high and low temperature is 30min. The switching time is 2min~3min. After five cycles, the test sample should be taken out of the high temperature box, restored at room temperature for 2h, and the temperature change resistance of the coating surface should be checked.
4.2.13 Moisture and heat resistance of coating
The moisture and heat resistance of coating shall be tested in accordance with GB1740. 4.2.14 Salt spray resistance of coating
Tested in accordance with the provisions of GB/T1771 salt spray test method. Take out at the specified time, wash with water, place at room temperature for 2h, and make an appearance inspection by visual inspection.
4.2.15 Mildew resistance of coating
According to the provisions of GIB 150.10-1986
The mildew resistance grade of the coating.
5. Inspection rules
5.1 Inspection classification
This specification stipulates the inspection labor cost
acceptance inspection;
b) Routine inspection
Coating inspection personnel
5.1.1 Acceptance inspection
Find the product that has passed the test approval
5.1.2 Routine inspection
ANDARA
Continued-28 d test joint
[Related regulations for coatings, according to
the coating has the following understanding
|select powder coating scientific re-edition is to apply
construction process has more state and more limit
polyester coating quality has car
equipment group exercise discretion.
During routine inspection,
5.2 Sampling inspection
Observe the installed surface and set the qualified products according to the degree of coating.
The functional test powder shall be based on the test report of the national INFORMA
invited testing unit provided by the coating manufacturer.
5.2.tSamples and quantity
5.2.1.1 Samples shall be taken from the products that have been inspected. For small batch production or large workpieces, samples can be made with the same base material, coating and process conditions and replaced by products for testing. 5.2.1.2 The number of test samples for each test item shall not be less than 3, which shall be determined by negotiation between the main ordering party and the contractor. 5.2.2 Judgment rules
5.2.2.1 When one or more items are unqualified during the test, the unqualified items shall be re-tested. If there is still one unqualified item, the coating of the batch of products shall be judged as unqualified. 5.2.2.2 The coating of unqualified products can be reprocessed or the coating can be removed and then re-coated for inspection. SJ20910—2004
Adhesion
Impact resistance
Observation test
Bending resistance
Acid resistance
Wire resistance
Solvent resistance
Overflow resistance
Moisture and heat resistance
Salt resistance, etc.
Required items
Inspection items
Test method number
Note: "must" in the table indicates that if there is no special regulation, it should be used Items to be inspected
"Select" in the table indicates items to be inspected according to the provisions of relevant documents based on the inspection items; "√" in the table indicates items to be inspected at 10%; "√" in the table indicates items to be inspected at random, and the number of each random inspection shall not be less than 3 pieces; if one sample is qualified, it is qualified; "√" in the table indicates items to be inspected at random, and the number of each random inspection shall not be less than 3 pieces, and if one sample is unqualified, it is unqualified; "Blank" in the table indicates inspection items for which no unified sampling plan is specified. iKAoiKAca=
AfBasic composition
Appendix A
(Normative appendix)
Powder coating mark
SJ 20%10-2004
A.1.1 Powder coating mark consists of four parts: coating symbol, coating color (or code)/model (or name), appearance grade and use environment conditions. Each part is connected by a dot "," and the order is as follows: Symbol
Material color (or code)/model (or name) A.1.2 Metal plating mark before coating consists of three parts: substrate material, plating method, etc. The order is as follows:
substrate material
plating method
Note: substrate material or related
Note 2: The second coating layer, special
A.1.3 Before coating, the metal plating mark consists of three parts such as substrate material, plating color, etc.
Base material
Note 1: Base material in
Method 2: If the chemical
A. 2 marking requirements
plating layer name
Appearance grade
Environmental observation
plating layer thickness, coating layer characteristics and post-treatment coating layer thickness
are clearly visible, it can be omitted
.
Electrochemical treatment marking
The material treatment method of the base material is specified in the document,
treatment characteristics
A.2.1 If the coating requirements of the outer surface of the coated product are different, the coating requirements of different parts are marked: the following are the requirements for the surface coating. A.2.2 Pre-treatment markings must be indicated when applying the paint. Material line marking: the right is the paint coating mark,
sensitive layer characteristics
tabby cat
translation
translation
post-treatment
physical characteristics and post-treatment (color)
line is the outer surface coating
separate the pre-treatment mark from the paint segment mark: the left side of the slash is the pre-treatment INEORN
A.2.3 If there are special requirements for the paint coating, it is allowed to use text description when using A.3 marking examples
.
Example: Aluminum products used in general environmental conditions, with semi-gloss military green epoxy powder benzene paint on the surface: the outer surface is processed according to [I level appearance grade, marked:
FT·Military Green (Semi-gloss) H-Il·Y
Example 2: Steel parts, electro-galvanized 7μm or more, rainbow chromic acid treatment level 2 C type, marked: Fe/Ep-Zn7-c2C
Example 3: Aluminum parts, electrochemical treatment, anodized, marked: AVEt-A
Example 4: Aluminum products used in general environmental conditions, with medium gray polycrystalline/epoxy powder coating on the surface, the outer surface is processed according to [level appearance grade, and the inner surface is processed according to V appearance grade: pre-treatment uses electrochemical treatment, sulfuric acid anodizing, optional pre-treatment, marked: SJ 20910--2004
A.4 Classification of appearance grades
AI/EtA(s)/FT·Medium grey z/H
The appearance quality of powder rice spraying can reach TI, III, IV grades. The appearance of the coating shall be inspected according to the requirements of SJ/T10674. See Table A.1 and Table A.2. V-level coating appearance The coating film is complete, and defects that do not affect the protective performance are allowed. Table A.1
Impurities and
Quality requirements Items
Glossiness
Uniformity
Comparison with standard color plate
Comparison between products
Quantity" m2
Defect repair intensity
Brush marks, scratches
Granules
(diameter)
Fibers
(length)
Artistic polyester layer texture or spots
Coating category
Quality requirements Items
Impurities and
Glossiness || tt||Evenness
Comparison with standard fish board
Comparison between products
Defect repair degree
Problem Granular
(diameter)
Fiber
(length)
Appearance of II-level coating
Flat paint layer
Conform to the provisions of the technical conditions of coating products
The gloss of the surface is uniform
Usually within the color difference range or no obvious difference
The color of the same layer of the same machine or batch of workpieces is consistent4-16
100-50
100-30
Good repair, no total defect.
Not allowed to have
Slight, uniform.
Partial, slight is allowed.
100-30
Table A.2JII-level coating appearance
Flat coating
Conforms to the requirements of the technical conditions of coating products
Surface finish is basically uniform
Within the color difference range or without significant difference
Color of the same coating between the surrounding units or the same batch of workpieces is basically consistent with 1-4
No accumulation of impurities is allowed
Minor defects are allowed.
Local slight flow marks are allowed.
TKANrKAca-
Art coating
Art texture or spots are clear and the distribution is relatively uniform. Artistic coating
Absolute
Coating category
Quality requirement items
Chair leather marks
Brush decay, scratches
Pinholes or spots
Texture spots of the art coating
Slight spots are allowed. Slight spots are allowed.
Table A.2 (continued)
Flat coating
May have a few, fine
SJ20910-2004
Painted coating
Unusual
Painted texture or spots are clear, and the distribution is basically uniform. STANDARDS
MINIST
INFORM
Chinese People's Liberation Army
Electronic Industry Military Standards
General Specification for Powder Electrostatic Coating
SJ 20910-2004
Produced by China Electronics Standardization Institute, issued by China Electronics Standardization Institute, telephone: (010) 84029065Fax: (010) 64007812Address: No. 1, Andianmen East Street, Beijing City
Editor: 100007
Website: wunw. cesi.ac. cn
Edition: B80×1230 1/16Printing sheet:
Word count: 24 thousand words
First edition in July 2005First printing in July 2005Printing quantity: 200 copiesPrice: 12 yuan
Copyright reserved
No reproduction
Report telephone: (010) 64007804
KAONiKAca=2 The coating of unqualified products can be reprocessed or re-coated after removing the coating: inspection. SJ20910—2004
Adhesion
Impact resistance
Observation test
Bending resistance
Acid resistance
Wire resistance
Solvent resistance
Overflow resistance
Moisture and heat resistance
Salt resistance, etc.
Required item
Inspection item
Test method number
Note: "Must" in the table indicates that if there is no special regulation, it should be used Items to be inspected
"Select" in the table indicates items to be inspected according to the provisions of relevant documents based on the inspection items; "√" in the table indicates items to be inspected at 10%; "√" in the table indicates items to be inspected at random, and the number of each random inspection shall not be less than 3 pieces; if one sample is qualified, it is qualified; "√" in the table indicates items to be inspected at random, and the number of each random inspection shall not be less than 3 pieces, and if one sample is unqualified, it is unqualified; "Blank" in the table indicates inspection items for which no unified sampling plan is specified. iKAoiKAca=
AfBasic composition
Appendix A
(Normative appendix)
Powder coating mark
SJ 20%10-2004
A.1.1 Powder coating mark consists of four parts: coating symbol, coating color (or code)/model (or name), appearance grade and use environment conditions. Each part is connected by a dot "," and the order is as follows: Symbol
Material color (or code)/model (or name) A.1.2 Metal plating mark before coating consists of three parts: substrate material, plating method, etc. The order is as follows:
substrate material
plating method
Note: substrate material or related
Note 2: The second coating layer, special
A.1.3 Before coating, the metal plating mark consists of three parts such as substrate material, plating color, etc.
Base material
Note 1: Base material in
Method 2: If the chemical
A. 2 marking requirements
plating layer name
Appearance grade
Environmental observation
plating layer thickness, coating layer characteristics and post-treatment coating layer thickness
are clearly visible, it can be omitted
.
Electrochemical treatment marking
The material treatment method of the base material is specified in the document,
treatment characteristics
A.2.1 If the coating requirements of the outer surface of the coated product are different, the coating requirements of different parts are marked: the following are the requirements for the surface coating. A.2.2 Pre-treatment markings must be indicated when applying the paint. Material line marking: the right is the paint coating mark,
sensitive layer characteristics
tabby cat
translation
translation
post-treatment
physical characteristics and post-treatment (color)
line is the outer surface coating
separate the pre-treatment mark from the paint segment mark: the left side of the slash is the pre-treatment INEORN
A.2.3 If there are special requirements for the paint coating, it is allowed to use text description when using A.3 marking examples
.
Example: Aluminum products used in general environmental conditions, with semi-gloss military green epoxy powder benzene paint on the surface: the outer surface is processed according to [I level appearance grade, marked:
FT·Military Green (Semi-gloss) H-Il·Y
Example 2: Steel parts, electro-galvanized 7μm or more, rainbow chromic acid treatment level 2 C type, marked: Fe/Ep-Zn7-c2C
Example 3: Aluminum parts, electrochemical treatment, anodized, marked: AVEt-A
Example 4: Aluminum products used in general environmental conditions, with medium gray polycrystalline/epoxy powder coating on the surface, the outer surface is processed according to [level appearance grade, and the inner surface is processed according to V appearance grade: pre-treatment uses electrochemical treatment, sulfuric acid anodizing, optional pre-treatment, marked: SJ 20910--2004
A.4 Classification of appearance grades
AI/EtA(s)/FT·Medium grey z/H
The appearance quality of powder rice spraying can reach TI, III, IV grades. The appearance of the coating shall be inspected according to the requirements of SJ/T10674. See Table A.1 and Table A.2. V-level coating appearance The coating film is complete, and defects that do not affect the protective performance are allowed. Table A.1
Impurities and
Quality requirements Items
Glossiness
Uniformity
Comparison with standard color plate
Comparison between products
Quantity" m2
Defect repair intensity
Brush marks, scratches
Granules
(diameter)
Fibers
(length)
Artistic polyester layer texture or spots
Coating category
Quality requirements Items
Impurities and
Glossiness || tt||Evenness
Comparison with standard fish board
Comparison between products
Defect repair degree
Problem Granular
(diameter)
Fiber
(length)
Appearance of II-level coating
Flat paint layer
Conform to the provisions of the technical conditions of coating products
The gloss of the surface is uniform
Usually within the color difference range or no obvious difference
The color of the same layer of the same machine or batch of workpieces is consistent4-16
100-50
100-30
Good repair, no total defect.
Not allowed to have
Slight, uniform.
Partial, slight is allowed.
100-30
Table A.2JII-level coating appearance
Flat coating
Conforms to the requirements of the technical conditions of coating products
Surface finish is basically uniform
Within the color difference range or without significant difference
Color of the same coating between the surrounding units or the same batch of workpieces is basically consistent with 1-4
No accumulation of impurities is allowed
Minor defects are allowed.
Local slight flow marks are allowed.
TKANrKAca-
Art coating
Art texture or spots are clear and the distribution is relatively uniform. Artistic coating
Absolute
Coating category
Quality requirement items
Chair leather marks
Brush decay, scratches
Pinholes or spots
Texture spots of the art coating
Slight spots are allowed. Slight spots are allowed.
Table A.2 (continued)
Flat coating
May have a few, fine
SJ20910-2004
Painted coating
Unusual
Painted texture or spots are clear, and the distribution is basically uniform. STANDARDS
MINIST
INFORM
Chinese People's Liberation Army
Electronic Industry Military Standards
General Specification for Powder Electrostatic Coating
SJ 20910-2004
Produced by China Electronics Standardization Institute, issued by China Electronics Standardization Institute, telephone: (010) 84029065Fax: (010) 64007812Address: No. 1, Andianmen East Street, Beijing City
Editor: 100007
Website: wunw. cesi.ac. cn
Edition: B80×1230 1/16Printing sheet:
Word count: 24 thousand words
First edition in July 2005First printing in July 2005Printing quantity: 200 copiesPrice: 12 yuan
Copyright reserved
No reproduction
Report telephone: (010) 64007804
KAONiKAca=2 The coating of unqualified products can be reprocessed or re-coated after removing the coating: inspection. SJ20910—2004
Adhesion
Impact resistance
Observation test
Bending resistance
Acid resistance
Wire resistance
Solvent resistance
Overflow resistance
Moisture and heat resistance
Salt resistance, etc.
Required item
Inspection item
Test method number
Note: "Must" in the table indicates that if there is no special regulation, it should be used Items to be inspected
"Select" in the table indicates items to be inspected according to the provisions of relevant documents based on the inspection items; "√" in the table indicates items to be inspected at 10%; "√" in the table indicates items to be inspected at random, and the number of each random inspection shall not be less than 3 pieces; if one sample is qualified, it is qualified; "√" in the table indicates items to be inspected at random, and the number of each random inspection shall not be less than 3 pieces, and if one sample is unqualified, it is unqualified; "Blank" in the table indicates inspection items for which no unified sampling plan is specified. iKAoiKAca=
AfBasic composition
Appendix A
(Normative appendix)
Powder coating mark
SJ 20%10-2004
A.1.1 Powder coating mark consists of four parts: coating symbol, coating color (or code)/model (or name), appearance grade and use environment conditions. Each part is connected by a dot "," and the order is as follows: Symbol
Material color (or code)/model (or name) A.1.2 Metal plating mark before coating consists of three parts: substrate material, plating method, etc. The order is as follows:
substrate material
plating method
Note: substrate material or related
Note 2: The second coating layer, special
A.1.3 Before coating, the metal plating mark consists of three parts such as substrate material, plating color, etc.
Base material
Note 1: Base material in
Method 2: If the chemical
A. 2 marking requirements
plating layer name
Appearance grade
Environmental observation
plating layer thickness, coating layer characteristics and post-treatment coating layer thickness
are clearly visible, it can be omitted
.
Electrochemical treatment marking
The material treatment method of the base material is specified in the document,
treatment characteristics
A.2.1 If the coating requirements of the outer surface of the coated product are different, the coating requirements of different parts are marked: the following are the requirements for the surface coating. A.2.2 Pre-treatment markings must be indicated when applying the paint. Material line marking: the right is the paint coating mark,
sensitive layer characteristics
tabby cat
translation
translation
post-treatment
physical characteristics and post-treatment (color)
line is the outer surface coating
separate the pre-treatment mark from the paint segment mark: the left side of the slash is the pre-treatment INEORN
A.2.3 If there are special requirements for the paint coating, it is allowed to use text description when using A.3 marking examples
.
Example: Aluminum products used in general environmental conditions, with semi-gloss military green epoxy powder benzene paint on the surface: the outer surface is processed according to [I level appearance grade, marked:
FT·Military Green (Semi-gloss) H-Il·Y
Example 2: Steel parts, electro-galvanized 7μm or more, rainbow chromic acid treatment level 2 C type, marked: Fe/Ep-Zn7-c2C
Example 3: Aluminum parts, electrochemical treatment, anodized, marked: AVEt-A
Example 4: Aluminum products used in general environmental conditions, with medium gray polycrystalline/epoxy powder coating on the surface, the outer surface is processed according to [level appearance grade, and the inner surface is processed according to V appearance grade: pre-treatment uses electrochemical treatment, sulfuric acid anodizing, optional pre-treatment, marked: SJ 20910--2004
A.4 Classification of appearance grades
AI/EtA(s)/FT·Medium grey z/H
The appearance quality of powder rice spraying can reach TI, III, IV grades. The appearance of the coating shall be inspected according to the requirements of SJ/T10674. See Table A.1 and Table A.2. V-level coating appearance The coating film is complete, and defects that do not affect the protective performance are allowed. Table A.1
Impurities and
Quality requirements Items
Glossiness
Uniformity
Comparison with standard color plate
Comparison between products
Quantity" m2
Defect repair intensity
Brush marks, scratches
Granules
(diameter)
Fibers
(length)
Artistic polyester layer texture or spots
Coating category
Quality requirements Items
Impurities and
Glossiness || tt||Evenness
Comparison with standard fish board
Comparison between products
Defect repair degree
Problem Granular
(diameter)
Fiber
(length)
Appearance of II-level coating
Flat paint layer
Conform to the provisions of the technical conditions of coating products
The gloss of the surface is uniform
Usually within the color difference range or no obvious difference
The color of the same layer of the same machine or batch of workpieces is consistent4-16
100-50
100-30
Good repair, no total defect.
Not allowed to have
Slight, uniform.
Partial, slight is allowed.
100-30
Table A.2JII-level coating appearance
Flat coating
Conforms to the requirements of the technical conditions of coating products
Surface finish is basically uniform
Within the color difference range or without significant difference
Color of the same coating between the surrounding units or the same batch of workpieces is basically consistent with 1-4
No accumulation of impurities is allowed
Minor defects are allowed.
Local slight flow marks are allowed.
TKANrKAca-
Art coating
Art texture or spots are clear and the distribution is relatively uniform. Artistic coating
Absolute
Coating category
Quality requirement items
Chair leather marks
Brush decay, scratches
Pinholes or spots
Texture spots of the art coating
Slight spots are allowed. Slight spots are allowed.
Table A.2 (continued)
Flat coating
May have a few, fine
SJ20910-2004
Painted coating
Unusual
Painted texture or spots are clear, and the distribution is basically uniform. STANDARDS
MINIST
INFORM
Chinese People's Liberation Army
Electronic Industry Military Standards
General Specification for Powder Electrostatic Coating
SJ 20910-2004
Produced by China Electronics Standardization Institute, issued by China Electronics Standardization Institute, telephone: (010) 84029065Fax: (010) 64007812Address: No. 1, Andianmen East Street, Beijing City
Editor: 100007
Website: wunw. cesi.ac. cn
Edition: B80×1230 1/16Printing sheet:
Word count: 24 thousand words
First edition in July 2005First printing in July 2005Printing quantity: 200 copiesPrice: 12 yuan
Copyright reserved
No reproduction
Report telephone: (010) 64007804
KAONiKAca=cn
Binding: B80×1230 1/16 Printing sheet:
Word count: 24 thousand words
First edition in July 2005 First printing in July 2005 Printing volume: 200 copies Price: 12 yuan
Copyright reserved
No reproduction allowed
Report phone number: (010) 64007804
KAONiKAca=cn
Binding: B80×1230 1/16 Printing sheet:
Word count: 24 thousand words
First edition in July 2005 First printing in July 2005 Printing volume: 200 copies Price: 12 yuan
Copyright reserved
No reproduction allowed
Report phone number: (010) 64007804
KAONiKAca=1 The powder coating mark consists of four parts: coating symbol, coating color (or code)/model (or name), appearance grade and use environment conditions. Each part is connected by a dot "," and the order is as follows: symbol
material color (or code)/model (or name) A.1.2 The metal coating mark before coating consists of three parts: base material and coating method. The order is as follows: bZxz.net
base material
coating method
Note: base material or related
Note 2: the coating layer is used again, and the characteristics are
A.1.3 The metal coating mark before coating consists of three parts: base material and coating color (or code) and the like. The order is as follows:
base material
coating method
Note: base material or related
Note 2: the coating layer is used again, and the characteristics are
A.1.3 The metal coating mark before coating consists of three parts: base material and coating color (or code) and the like.
Base material
Note 1: Base material in
Method 2: If the chemical
A. 2 marking requirements
plating layer name
Appearance grade
Environmental observation
plating layer thickness, coating layer characteristics and post-treatment coating layer thickness
are clearly visible, it can be omitted
.
Electrochemical treatment marking
The material treatment method of the base material is specified in the document,
treatment characteristics
A.2.1 If the coating requirements of the outer surface of the coated product are different, the coating requirements of different parts are marked: the following are the requirements for the surface coating. A.2.2 Pre-treatment markings must be indicated when applying the paint. Material line marking: the right is the paint coating mark,
sensitive layer characteristics
tabby cat
translation
translation
post-treatment
physical characteristics and post-treatment (color)
line is the outer surface coating
separate the pre-treatment mark from the paint segment mark: the left side of the slash is the pre-treatment INEORN
A.2.3 If there are special requirements for the paint coating, it is allowed to use text description when using A.3 marking examples
.
Example: Aluminum products used in general environmental conditions, with semi-gloss military green epoxy powder benzene paint on the surface: the outer surface is processed according to [I level appearance grade, marked:
FT·Military Green (Semi-gloss) H-Il·Y
Example 2: Steel parts, electro-galvanized 7μm or more, rainbow chromic acid treatment level 2 C type, marked: Fe/Ep-Zn7-c2C
Example 3: Aluminum parts, electrochemical treatment, anodized, marked: AVEt-A
Example 4: Aluminum products used in general environmental conditions, with medium gray polycrystalline/epoxy powder coating on the surface, the outer surface is processed according to [level appearance grade, and the inner surface is processed according to V appearance grade: pre-treatment uses electrochemical treatment, sulfuric acid anodizing, optional pre-treatment, marked: SJ 20910--2004
A.4 Classification of appearance grades
AI/EtA(s)/FT·Medium grey z/H
The appearance quality of powder rice spraying can reach TI, III, IV grades. The appearance of the coating shall be inspected according to the requirements of SJ/T10674. See Table A.1 and Table A.2. V-level coating appearance The coating film is complete, and defects that do not affect the protective performance are allowed. Table A.1
Impurities and
Quality requirements Items
Glossiness
Uniformity
Comparison with standard color plate
Comparison between products
Quantity" m2
Defect repair intensity
Brush marks, scratches
Granules
(diameter)
Fibers
(length)
Artistic polyester layer texture or spots
Coating category
Quality requirements Items
Impurities and
Glossiness || tt||Evenness
Comparison with standard fish board
Comparison between products
Defect repair degree
Problem Granular
(diameter)
Fiber
(length)
Appearance of II-level coating
Flat paint layer
Conform to the provisions of the technical conditions of coating products
The gloss of the surface is uniform
Usually within the color difference range or no obvious difference
The color of the same layer of the same machine or batch of workpieces is consistent4-16
100-50
100-30
Good repair, no total defect.
Not allowed to have
Slight, uniform.
Partial, slight is allowed.
100-30
Table A.2JII-level coating appearance
Flat coating
Conforms to the requirements of the technical conditions of coating products
Surface finish is basically uniform
Within the color difference range or without significant difference
Color of the same coating between the surrounding units or the same batch of workpieces is basically consistent with 1-4
No accumulation of impurities is allowed
Minor defects are allowed.
Local slight flow marks are allowed.
TKANrKAca-
Art coating
Art texture or spots are clear and the distribution is relatively uniform. Artistic coating
Absolute
Coating category
Quality requirement items
Chair leather marks
Brush decay, scratches
Pinholes or spots
Texture spots of the art coating
Slight spots are allowed. Slight spots are allowed.
Table A.2 (continued)
Flat coating
May have a few, fine
SJ20910-2004
Painted coating
Unusual
Painted texture or spots are clear, and the distribution is basically uniform. STANDARDS
MINIST
INFORM
Chinese People's Liberation Army
Electronic Industry Military Standards
General Specification for Powder Electrostatic Coating
SJ 20910-2004
Produced by China Electronics Standardization Institute, issued by China Electronics Standardization Institute, telephone: (010) 84029065Fax: (010) 64007812Address: No. 1, Andianmen East Street, Beijing City
Editor: 100007
Website: wunw. cesi.ac. cn
Edition: B80×1230 1/16Printing sheet:
Word count: 24 thousand words
First edition in July 2005First printing in July 2005Printing quantity: 200 copiesPrice: 12 yuan
Copyright reserved
No reproduction
Report telephone: (010) 64007804
KAONiKAca=1 The powder coating mark consists of four parts: coating symbol, coating color (or code)/model (or name), appearance grade and use environment conditions. Each part is connected by a dot "," and the order is as follows: symbol
material color (or code)/model (or name) A.1.2 The metal coating mark before coating consists of three parts: base material and coating method. The order is as follows:
base material
coating method
Note: base material or related
Note 2: the coating layer is used again, and the characteristics are
A.1.3 The metal coating mark before coating consists of three parts: base material and coating color (or code) and the like. The order is as follows:
base material
coating method
Note: base material or related
Note 2: the coating layer is used again, and the characteristics are
A.1.3 The metal coating mark before coating consists of three parts: base material and coating color (or code) and the like.
Base material
Note 1: Base material in
Method 2: If the chemical
A. 2 marking requirements
plating layer name
Appearance grade
Environmental observation
plating layer thickness, coating layer characteristics and post-treatment coating layer thickness
are clearly visible, it can be omitted
.
Electrochemical treatment marking
The material treatment method of the base material is specified in the document,
treatment characteristics
A.2.1 If the coating requirements of the outer surface of the coated product are different, the coating requirements of different parts are marked: the following are the requirements for the surface coating. A.2.2 Pre-treatment markings must be indicated when applying the paint. Material line marking: the right is the paint coating mark,
sensitive layer characteristics
tabby cat
translation
translation
post-treatment
physical characteristics and post-treatment (color)
line is the outer surface coating
separate the pre-treatment mark from the paint segment mark: the left side of the slash is the pre-treatment INEORN
A.2.3 If there are special requirements for the paint coating, it is allowed to use text description when using A.3 marking examples
.
Example: Aluminum products used in general environmental conditions, with semi-gloss military green epoxy powder benzene paint on the surface: the outer surface is processed according to [I level appearance grade, marked:
FT·Military Green (Semi-gloss) H-Il·Y
Example 2: Steel parts, electro-galvanized 7μm or more, rainbow chromic acid treatment level 2 C type, marked: Fe/Ep-Zn7-c2C
Example 3: Aluminum parts, electrochemical treatment, anodized, marked: AVEt-A
Example 4: Aluminum products used in general environmental conditions, with medium gray polycrystalline/epoxy powder coating on the surface, the outer surface is processed according to [level appearance grade, and the inner surface is processed according to V appearance grade: pre-treatment uses electrochemical treatment, sulfuric acid anodizing, optional pre-treatment, marked: SJ 20910--2004
A.4 Classification of appearance grades
AI/EtA(s)/FT·Medium grey z/H
The appearance quality of powder rice spraying can reach TI, III, IV grades. The appearance of the coating shall be inspected according to the requirements of SJ/T10674. See Table A.1 and Table A.2. V-level coating appearance The coating film is complete, and defects that do not affect the protective performance are allowed. Table A.1
Impurities and
Quality requirements Items
Glossiness
Uniformity
Comparison with standard color plate
Comparison between products
Quantity" m2
Defect repair intensity
Brush marks, scratches
Granules
(diameter)
Fibers
(length)
Artistic polyester layer texture or spots
Coating category
Quality requirements Items
Impurities and
Glossiness || tt||Evenness
Comparison with standard fish board
Comparison between products
Defect repair degree
Problem Granular
(diameter)
Fiber
(length)
Appearance of II-level coating
Flat paint layer
Conform to the provisions of the technical conditions of coating products
The gloss of the surface is uniform
Usually within the color difference range or no obvious difference
The color of the same layer of the same machine or batch of workpieces is consistent4-16
100-50
100-30
Good repair, no total defect.
Not allowed to have
Slight, uniform.
Partial, slight is allowed.
100-30
Table A.2JII-level coating appearance
Flat coating
Conforms to the requirements of the technical conditions of coating products
Surface finish is basically uniform
Within the color difference range or without significant difference
Color of the same coating between the surrounding units or the same batch of workpieces is basically consistent with 1-4
No accumulation of impurities is allowed
Minor defects are allowed.
Local slight flow marks are allowed.
TKANrKAca-
Art coating
Art texture or spots are clear and the distribution is relatively uniform. Artistic coating
Absolute
Coating category
Quality requirement items
Chair leather marks
Brush decay, scratches
Pinholes or spots
Texture spots of the art coating
Slight spots are allowed. Slight spots are allowed.
Table A.2 (continued)
Flat coating
May have a few, fine
SJ20910-2004
Painted coating
Unusual
Painted texture or spots are clear, and the distribution is basically uniform. STANDARDS
MINIST
INFORM
Chinese People's Liberation Army
Electronic Industry Military Standards
General Specification for Powder Electrostatic Coating
SJ 20910-2004
Produced by China Electronics Standardization Institute, issued by China Electronics Standardization Institute, telephone: (010) 84029065Fax: (010) 64007812Address: No. 1, Andianmen East Street, Beijing City
Editor: 100007
Website: wunw. cesi.ac. cn
Edition: B80×1230 1/16Printing sheet:
Word count: 24 thousand words
First edition in July 2005First printing in July 2005Printing quantity: 200 copiesPrice: 12 yuan
Copyright reserved
No reproduction
Report telephone: (010) 64007804
KAONiKAca=3 Marking examples
, it is allowed to use text description.
Example Aluminum products used in general environmental conditions, the surface is coated with semi-gloss military green epoxy powder benzene paint: the outer surface is processed according to [I grade appearance grade, marking:
FT·Military Green (Semi-gloss) H-Il·Y
Example 2 Steel parts, electro-galvanized 7μm or more, rainbow chromic acid treatment 2nd grade C type, marking: Fe/Ep-Zn7-c2C
Example 3 Aluminum parts, electrochemical treatment, anodized, marking: AVEt-A
Example 4 Aluminum products used in general environmental conditions, the surface is coated with medium gray polycrystalline/epoxy powder, the outer surface is processed according to [grade appearance grade, and the inner surface is processed according to V appearance grade: pre-treatment is electrochemical treatment, sulfuric acid anodizing, optional pre-treatment, marking: SJ 20910--2004
A.4 Classification of appearance grades
AI/EtA(s)/FT·Medium grey z/H
The appearance quality of powder rice spraying can reach TI, III, IV grades. The appearance of the coating shall be inspected according to the requirements of SJ/T10674. See Table A.1 and Table A.2. V-level coating appearance The coating film is complete, and defects that do not affect the protective performance are allowed. Table A.1
Impurities and
Quality requirements Items
Glossiness
Uniformity
Comparison with standard color plate
Comparison between products
Quantity" m2
Defect repair intensity
Brush marks, scratches
Granules
(diameter)
Fibers
(length)
Artistic polyester layer texture or spots
Coating category
Quality requirements Items
Impurities and
Glossiness || tt||Evenness
Comparison with standard fish board
Comparison between products
Defect repair degree
Problem Granular
(diameter)
Fiber
(length)
Appearance of II-level coating
Flat paint layer
Conform to the provisions of the technical conditions of coating products
The gloss of the surface is uniform
Usually within the color difference range or no obvious difference
The color of the same layer of the same machine or batch of workpieces is consistent4-16
100-50
100-30
Good repair, no total defect.
Not allowed to have
Slight, uniform.
Partial, slight is allowed.
100-30
Table A.2JII-level coating appearance
Flat coating
Conforms to the requirements of the technical conditions of coating products
Surface finish is basically uniform
Within the color difference range or without significant difference
Color of the same coating between the surrounding units or the same batch of workpieces is basically consistent with 1-4
No accumulation of impurities is allowed
Minor defects are allowed.
Local slight flow marks are allowed.
TKANrKAca-
Art coating
Art texture or spots are clear and the distribution is relatively uniform. Artistic coating
Absolute
Coating category
Quality requirement items
Chair leather marks
Brush decay, scratches
Pinholes or spots
Texture spots of the art coating
Slight spots are allowed. Slight spots are allowed.
Table A.2 (continued)
Flat coating
May have a few, fine
SJ20910-2004
Painted coating
Unusual
Painted texture or spots are clear, and the distribution is basically uniform. STANDARDS
MINIST
INFORM
Chinese People's Liberation Army
Electronic Industry Military Standards
General Specification for Powder Electrostatic Coating
SJ 20910-2004
Produced by China Electronics Standardization Institute, issued by China Electronics Standardization Institute, telephone: (010) 84029065Fax: (010) 64007812Address: No. 1, Andianmen East Street, Beijing City
Editor: 100007
Website: wunw. cesi.ac. cn
Edition: B80×1230 1/16Printing sheet:
Word count: 24 thousand words
First edition in July 2005First printing in July 2005Printing quantity: 200 copiesPrice: 12 yuan
Copyright reserved
No reproduction
Report telephone: (010) 64007804
KAONiKAca=3 Marking examples
, it is allowed to use text description.
Example Aluminum products used in general environmental conditions, the surface is coated with semi-gloss military green epoxy powder benzene paint: the outer surface is processed according to [I grade appearance grade, marking:
FT·Military Green (Semi-gloss) H-Il·Y
Example 2 Steel parts, electro-galvanized 7μm or more, rainbow chromic acid treatment 2nd grade C type, marking: Fe/Ep-Zn7-c2C
Example 3 Aluminum parts, electrochemical treatment, anodized, marking: AVEt-A
Example 4 Aluminum products used in general environmental conditions, the surface is coated with medium gray polycrystalline/epoxy powder, the outer surface is processed according to [grade appearance grade, and the inner surface is processed according to V appearance grade: pre-treatment is electrochemical treatment, sulfuric acid anodizing, optional pre-treatment, marking: SJ 20910--2004
A.4 Classification of appearance grades
AI/EtA(s)/FT·Medium grey z/H
The appearance quality of powder rice spraying can reach TI, III, IV grades. The appearance of the coating shall be inspected according to the requirements of SJ/T10674. See Table A.1 and Table A.2. V-level coating appearance The coating film is complete, and defects that do not affect the protective performance are allowed. Table A.1
Impurities and
Quality requirements Items
Glossiness
Uniformity
Comparison with standard color plate
Comparison between products
Quantity" m2
Defect repair intensity
Brush marks, scratches
Granules
(diameter)
Fibers
(length)
Artistic polyester layer texture or spots
Coating category
Quality requirements Items
Impurities and
Glossiness || tt||Evenness
Comparison with standard fish board
Comparison between products
Defect repair degree
Problem Granular
(diameter)
Fiber
(length)
Appearance of II-level coating
Flat paint layer
Conform to the provisions of the technical conditions of coating products
The gloss of the surface is uniform
Usually within the color difference range or no obvious difference
The color of the same layer of the same machine or batch of workpieces is consistent4-16
100-50
100-30
Good repair, no total defect.
Not allowed to have
Slight, uniform.
Partial, slight is allowed.
100-30
Table A.2JII-level coating appearance
Flat coating
Conforms to the requirements of the technical conditions of coating products
Surface finish is basically uniform
Within the color difference range or without significant difference
Color of the same coating between the surrounding units or the same batch of workpieces is basically consistent with 1-4
No accumulation of impurities is allowed
Minor defects are allowed.
Local slight flow marks are allowed.
TKANrKAca-
Art coating
Art texture or spots are clear and the distribution is relatively uniform. Artistic coating
Absolute
Coating category
Quality requirement items
Chair leather marks
Brush decay, scratches
Pinholes or spots
Texture spots of the art coating
Slight spots are allowed. Slight spots are allowed.
Table A.2 (continued)
Flat coating
May have a few, fine
SJ20910-2004
Painted coating
Unusual
Painted texture or spots are clear, and the distribution is basically uniform. STANDARDS
MINIST
INFORM
Chinese People's Liberation Army
Electronic Industry Military Standards
General Specification for Powder Electrostatic Coating
SJ 20910-2004
Produced by China Electronics Standardization Institute, issued by China Electronics Standardization Institute, telephone: (010) 84029065Fax: (010) 64007812Address: No. 1, Andianmen East Street, Beijing City
Editor: 100007
Website: wunw. cesi.ac. cn
Edition: B80×1230 1/16Printing sheet:
Word count: 24 thousand words
First edition in July 2005First printing in July 2005Printing quantity: 200 copiesPrice: 12 yuan
Copyright reserved
No reproduction
Report telephone: (010) 64007804
KAONiKAca=2 (Continued)
Flat layer
May have a few, fine
SJ20910-2004
Art coating
Unclear
Art texture or spots are clear, and the distribution is basically uniform. STANDARDS
MINIST
INFORM
Chinese people's spirit technology and national
Electronic industry military standard
General specification for powder electrostatic coating
SJ 20910-2004
Produced by China Electronics Technology Standardization Institute and issued by China Electronics Technology Standardization Institute. Tel: (010) 84029065 Fax: (010) 64007812 Address: No. 1, Andianmen East Street, Beijing
Editor: 100007
Website: wunw. cesi.ac.cn
Binding: B80×1230 1/16 Printing sheet:
Word count: 24 thousand words
First edition in July 2005 First printing in July 2005 Printing volume: 200 copies Price: 12 yuan
Copyright reserved
No reproduction allowed
Report phone number: (010) 64007804
KAONiKAca=2 (Continued)
Flat layer
May have a few, fine
SJ20910-2004
Art coating
Unclear
Art texture or spots are clear, and the distribution is basically uniform. STANDARDS
MINIST
INFORM
Chinese people
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