Some standard content:
Chemical Industry Standard of the People's Republic of China
HG/T2798—1996
Chlorinated Rubber Anticorrosive Coatings
Published on April 10, 1996
Ministry of Chemical Industry of the People's Republic of China
Implemented on January 1, 1997
WHG/T2798—1996
This standard is formulated based on the Japanese Industrial Standard JIS K5639—1989 "Chlorinated Rubber Coatings". This standard is equivalent to JIS K5639—1989, and the difference is that: 1. The name of the "hiding rate" item is changed to "hiding power", which is based on my country's national conditions. In my country's coating product standards, the concept of hiding power is usually expressed as "hiding power", and the test method is simple. 1. The name of the item "heating residue" is changed to "solid content" according to the provisions of GB/T5206.4 "Vocabulary of paints and varnishes Part 4
Terms of physical and chemical properties of paints and coatings", and its technical indicators are exactly the same as JISK5639-1989. This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Paints and Pigments. The responsible drafting units of this standard are: Shanghai Kailin Paint Factory and the 725th Institute of China Shipbuilding Corporation. The participating drafting units of this standard are: Changzhou Paint Chemical Research Institute of the Ministry of Chemical Industry, Wuxi Paint Factory, Jiangsu Lanling Marine Paint Factory, Dalian Paint Factory, Tianjin Dengta Paint Co., Ltd., Chongqing Three Gorges Paint Co., Ltd., Qingdao Paint Factory, and the Marine Paint Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are: Xu Lili, Jin Zhongmin, Lu Bocen, Jin Xiaohong, Jiang Jimin, Su Mei, and Ou Boxing. I
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Chemical Industry Standards of the People's Republic of China
Chlorinated Rubber Anticorrosive Coatings
This standard specifies the requirements, test methods, signs, labels and packaging of chlorinated rubber anticorrosive coatings. HG/T2798—1996
This standard is applicable to chlorinated rubber primers, intermediate coatings and topcoat anticorrosive coatings made with chlorinated rubber as the paint base and other synthetic resins, pigments, solvents, etc.
2Cited Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1725-79(89)
Determination of solid content of coatings
GB/T1726-79(89)Determination of hiding power of coatingsGB/T1728-79(89)Determination of drying time of paint and putty filmsGB/T1763-79(89)Determination of chemical resistance of paint filmsGB/T1767-79(89)Determination of weather resistance of paint filmsGB/T3186-82(89)Sampling of coating products (negISO15121974, etc.)GB/T6742-86 Film bending test (cylindrical axis) (neqISO1519:1973) GB/T6753.1-86 Determination of grinding fineness of paint (eqvISO1524:1983) Standard test plate for paint and varnish (eqvISo1514:1984) GB/T9271-88
GB9278-88 Conditioning of paint sample state and temperature and humidity for testing (eqvISO3270:1984) Packaging mark for paint products
GB/T9750——88
GB/T 9754—88
Paints and varnishes Determination of specular gloss at 20°, 60° and 85° of paint films without metallic pigments (neqISo2813:1978)
GB/T13491—92 General rules for packaging of coating products GB/T14522—93 Artificial climate accelerated test methods for plastics, coatings and rubber materials for mechanical industrial products 3 Requirements
Product performance should comply with the requirements of Table 1.
Table 1 Performance requirements
State in the container
Fineness, um
Workability
Approved by the Ministry of Chemical Industry of the People's Republic of China on April 10, 1996Intermediate layer paint
After stirring and mixing, there is no hard lump and it is in a uniform state for 60
No obstacles in brushing
Implementation on January 1, 1997
Wbzsoso, cO items
Drying time, h
Appearance of paint film
Compatibility with the next paint
Hiding power", g/m2
Interlayer adhesion
Bending resistance, mm
Salt water resistance, 168h
Alkali resistance, 48h
60°Mirror gloss
Solid Content 2, %
Solvent insoluble matter, %
Qualification of chlorine in solvent soluble matter
Accelerated aging test, 300h
Weather resistance 2, 24 months
1) White paint
HG/T2798—1996
Table 1 (end)
Intermediate layer paint
Appearance of paint film is normal
No adverse effect on the next paint
No abnormality
No abnormality
No abnormality
Above 35
Below 45
2) For products produced in the past, if the inspection results are qualified, the current products are considered to be qualified as well 4 Test method
4.1 Sampling
Presence of chlorine
Below 35
No blistering or peeling No blistering, no peeling, no cracking, slight changes in color and gloss are allowed, and the degree of powdering of white and light-colored paint is not large. No blistering, no peeling, no cracking, slight changes in color and gloss are allowed, and the degree of powdering of white and light-colored paint is not large. The product shall be sampled in accordance with the provisions of GB3186. The samples shall be divided into two parts, one for sealed storage for future reference, and the other for inspection. 4.2 Test conditions
According to the provisions of GB9278. Www.bzxZ.net
4.3 Preparation of test specimens
4.3.1 The test base plate shall be processed in accordance with the provisions of GB/T9271. Unless otherwise specified, the base plate shall be a steel plate. 4.3.2 The amount of test paint, unless otherwise specified, is 40g/m2 for phosphating primer, 180g/m2 for primer, 120g/m2 for intermediate paint, and 100g/m2 for topcoat.
4. 4 State in the container
Open the container and stir with a spatula or a stirring rod. Allow sediment to form at the bottom of the container. If it can be easily mixed after stirring, it is rated as "no hard lumps after stirring and mixing, and in a uniform state".
Instructions for use:
1JJISK5639 calls it "hiding rate". 2JJISK5639 calls it "heating residue". 2
Wbzsoso.cOn4.5 Fineness
According to GB/T6753.1.
4.6 Constructionability
HG/T2798—1996
Brush the sample on a steel plate of about 200mm×100mm×1mm (the thickness of the paint film is in accordance with the product regulations). If there is no obvious drawing, bubbles, sagging, etc., it can be judged as "no obstacle to brushing". 4.7 Drying time
According to Method A in Chapter 3 of GB/T1728. 4.8 Appearance of paint film
Use the sample that has been tested in 4.6, and place it for 48 hours after painting for evaluation. Visually inspect the painted surface under scattered sunlight. If the paint film is flat and the degree of sagging, bubbling and blooming is not large, it is considered that "the appearance of the paint film is normal". 4.9 Compatibility with the next coat of paint
Use the sample that has been tested in 4.8. For the test of primer, apply the intermediate coat of paint; for the test of intermediate coat of paint, apply the top coat. When evaluating its compatibility, first, there should be no obstacles to the application of the next coat of paint. Then, 48 hours after painting, visually inspect the painted surface under scattered sunlight. If there is no shrinkage, cracking, pinholes, peeling and wrinkling, touch it with your fingertips. If the degree of adhesion is not large, it can be considered that "there is no adverse effect on the next coat of paint".
4.10 Hiding power
According to Method A in Chapter 2 of GB/T1726. 4.11 Interlayer adhesion
4.11.1 Adhesion between primer and intermediate layer paint shall be carried out according to the following provisions. 4.11.1.1 Preparation of sample
On one side of the steel plate (about 150mm×50mm×0.3mm), apply a phosphating primer, leave it for 48 hours, then apply two primers (24 hours apart), and leave it for 7 days. Then, conduct an accelerated aging test for 180 hours according to GB/T14522. Leave the sample that has undergone the accelerated aging test for 24 hours, then apply a layer of intermediate layer paint, leave it for 24 hours, and then apply a topcoat. Place the painted surface upward, horizontally, and dry for 7 days as a test sample. Prepare three test samples.
4.11.1.2 Operation steps
a) Use a hook to hang the test sample in a humidity test machine that maintains a temperature of 50±1℃ and a relative humidity of more than 95%. b) Take it out after 24 hours, immediately cover the painted surface with filter paper gently to absorb its moisture, and then leave it for another hour. c) Use the tip of the knife 3 to cut two lines of about 40mm in length in the central part of the test sample shown in Figure 1 in a direction parallel to the short side and with an interval of 15mm, and cut through to the bottom plate of the test sample.
Figure 1 Cutting method and method of sticking cellophane tape d) Across the area within the two cut lines, stick a cellophane tape line at a right angle to the cut lines in the approximate central part. Try to use Note:
3 It is recommended to use an art knife.
Wbzsoso.cOn without bringing in air.
HG/T2798—1996
e) Use an adhesive cellophane tape with a total length of about 75mm and a width of 24mm, so that it protrudes about 10mm outside the two cutting lines, and fold one end of the tape back 20mm. Press the surface with the tape back and forth with your thumb to make the tape completely adhere to the paint film surface.
f) Quickly pull one end of the tape back and forth at a right angle, pull it across the paint film surface, and check the paint film after peeling. 4.11.1.3 Evaluation
If there is no peeling between the primer film and the intermediate paint film on two or more test specimens or the peeling width along the cutting line is less than 3mm, it is considered "no abnormality". 4.11.2 The adhesion between the topcoat and the intermediate paint shall be carried out in accordance with the following provisions. 4.11.2.1 Preparation of sample
On one side of the steel plate (about 150mm×50mm×0.3mm), apply a layer of phosphating primer, leave it for 4 hours, apply a layer of intermediate paint, leave it for 24 hours, apply a layer of topcoat, and leave it for 7 days. Then carry out the accelerated aging test for 180 hours according to GB/T14522. Leave the sample after the accelerated aging test for 24 hours, apply a layer of intermediate paint, leave it for 24 hours, apply a layer of topcoat, make the painted surface face up, place it horizontally, dry it for 7 days, and use it as the test sample. Prepare three test samples. 4.11.2.2 Operation steps
Same as 4.11.1.2.
4.11.2.3 Evaluation
If there is no peeling between the topcoat film and the intermediate paint film of two or more test samples or the peeling width along the cutting line is less than 3mm, it is considered as "no abnormality". 4.12 Bending resistance
Perform the test in accordance with GB/T6742.
4.13 Salt water resistance
Perform the test in accordance with Method A of 3.1 of GB/T1763. If two or more of the three test panels show no peeling, cracking or rusting, it is considered "normal". 4.14 Alkali resistance
Perform the test in accordance with GB/T1763.
After immersing the three test panels in 0.5% NaOH solution, if two or more of the paint films show no cracking, peeling, softening or dissolution, and the size of the bubbles is less than 0.1mm and the area of the bubbles is less than 0.5%, it is considered "normal" when immersed in the alkali solution. 4.1560° mirror gloss
Perform the test in accordance with GB/T9754.
4.16 Solid content
According to Method A in Chapter 2 of GB/T1725. 4.17 Solvent insoluble matter
4.17.1 Operation
In a centrifuge tube of known mass, weigh about 10g (accurate to 0.0001g) of sample, add about 20mL of solvent, stir with a glass rod, use the solvent to wash the sample adhering to the glass rod into the centrifuge tube as much as possible, add solvent to 40mL, use a centrifuge to separate the solid and liquid, and pour out the upper liquid in the centrifuge tube. Repeat the above operation, using 30mL of solvent each time, and centrifuge four times in total. The composition of the solvent is: the first to third times are a mixed solvent of xylene: methyl isobutyl ketone (volume ratio 2:1), and the fourth time is acetone. Then immerse the bottom of the centrifuge test tube in hot water, tap the test tube with a wooden board wrapped with 5 to 6 layers of gauze to separate the sediment in the test tube from the inner wall, bake the test tube at 105 to 110℃ for 2h, put it in a dryer and cool it to room temperature, weigh it, and calculate the percentage increase of the test tube. Instructions:
4 It is recommended to use Panda brand cellophane tape.
W can calculate the amount of solvent insoluble matter.
4.17.2 Calculate
Solvent insoluble matter (%), calculate according to formula (1). HG/T2798—1996
Where: A-solvent insoluble matter, expressed as mass percentage; B-centrifuge test tube increment value, g
S-mass of the sample, g.
4.18 Qualitative analysis of chlorine in solvent-soluble matter
For the qualitative analysis of chlorine in solvent-soluble matter, separate according to the provisions of 4.17.1. Pour the supernatant after the first separation into an evaporating dish and heat it in a water bath to make most of it evaporate to make a concentrated solution. Then, use the device in Figure 2 to put the concentrated solution (about 0.2-0.5g) into a test tube and slowly heat it with a burner to decompose it.
Put O. Lmoi/LAgNU, and Imal /T,IIN()Agents and administrative personnel
Brand post installation personnel and sales
Burner
Figure 2 Schematic diagram of chlorine qualitative test device
Put 5mL of 0.1mol/L silver nitrate solution and about 1mL of 1mol/L nitric acid solution in another test tube (g15mm), and use a glass tube to introduce the decomposed gas into it. While adjusting the burner, carbonize most of the sample, and shake and mix the test tube with silver nitrate solution.
If obvious white precipitation is seen, it is considered that "chlorine is present" . 4.19 Accelerated aging test
Perform according to GB/T14522. On the surface of the steel plate (150mmX70mmX0.8mm), apply a layer of phosphating primer, leave it for 4 hours, apply a layer of intermediate paint with the specified amount, leave it for 24 hours, then apply a layer of topcoat with the specified amount, leave it for 24 hours, and coat the back and edges of the plate with primer and seal the edges. Leave it for 6 days as a test sample. 4.20 Weather resistance
Perform according to GB/T1767. On one side of the steel plate (150mm×250mm×1mm) On the surface, apply a layer of organic zinc-rich primer specified by the manufacturer to make the paint film thickness after drying to 15-25um, leave it for 48 hours, then apply another layer of primer, leave it for 24 hours, then apply another layer of intermediate paint, leave it for 24 hours, and finally apply a topcoat, leave it for 7 days, as a test sample. All performance requirements listed in this standard (except weather resistance) are type inspection items, among which the state in the container, fineness, construction, drying time, paint film appearance, hiding power, 60° mirror gloss, and solid content are factory inspection items. Under normal production conditions, at least one Conduct a type inspection. The product storage period is one year from the date of production. After the storage period, it can still be used if it passes the inspection. 5 Marking, labeling, packaging
5.1 Marking
Perform in accordance with GB/T9750.
5.2 Labeling
The product should be accompanied by a label indicating the product's standard number, model, name, quantity, quality certification mark, manufacturer name, production date, and batch number. 5.3 Packaging
Perform in accordance with GB/T13491.
W.bzsoso：com2 The adhesion between the topcoat and the intermediate layer of paint shall be tested in accordance with the following provisions. 4.11.2.1 Preparation of the sample
On one side of the steel plate (about 150mm×50mm×0.3mm), apply a layer of phosphating primer, leave it for 4 hours, apply a layer of intermediate layer paint, leave it for 24 hours, apply a layer of topcoat, and leave it for 7 days. Then, conduct an accelerated aging test for 180 hours in accordance with GB/T14522. Leave the sample that has undergone the accelerated aging test for 24 hours, apply a layer of intermediate layer paint, leave it for 24 hours, and apply a layer of topcoat. Place the painted surface upward, horizontally, and dry for 7 days as a test sample. Prepare three test samples. 4.11.2.2 Operation steps
Same as 4.11.1.2.
4.11.2.3 Evaluation
If there is no peeling between the topcoat film and the intermediate paint film on two or more test panels or the peeling width along the cutting line is less than 3mm, it is considered "no abnormality". 4.12 Bending resistance
Perform in accordance with GB/T6742.
4.13 Salt water resistance
Perform in accordance with Method A of 3.1 of GB/T1763. If there is no peeling, cracking or rusting of the paint film on two or more of the three test panels, it is considered "no abnormality". 4.14 Alkali resistance
Perform in accordance with GB/T1763.
After immersing three test panels in 0.5% NaOH solution, if two or more paint films do not show cracking, peeling, softening or dissolution, and the size of the blister is less than 0.1mm and the blister area is less than 0.5%, it is considered that there is "no abnormality" in the alkali solution. 4.1560° mirror gloss
According to GB/T9754.
4.16 Solid content
According to Method A in Chapter 2 of GB/T1725. 4.17 Solvent insoluble matter
4.17.1 Operation
In a centrifuge tube of known mass, weigh about 10g (accurate to 0.0001g) of sample, add about 20mL of solvent, stir with a glass rod, use the solvent to wash the sample adhering to the glass rod into the centrifuge tube as much as possible, add solvent to 40mL, use a centrifuge to separate the solid and liquid, and pour out the upper liquid in the centrifuge tube. Repeat the above operation, using 30mL of solvent each time, and centrifuge four times in total. The composition of the solvent is: the 1st to 3rd times is a mixed solvent of xylene: methyl isobutyl ketone (volume ratio 2:1), and the 4th time is acetone. Then immerse the bottom of the centrifuge test tube in hot water, tap the test tube with a wooden board wrapped with 5 to 6 layers of gauze to separate the sediment in the test tube from the inner wall, bake the test tube at 105 to 110℃ for 2h, put it in a dryer and cool it to room temperature, weigh it, and calculate the percentage increase of the test tube. Instructions:
4 It is recommended to use Panda brand cellophane tape.
W can calculate the amount of solvent insoluble matter.
4.17.2 Calculate
Solvent insoluble matter (%), calculate according to formula (1). HG/T2798—1996
Where: A-solvent insoluble matter, expressed as mass percentage; B-centrifuge test tube increment value, g
S-mass of the sample, g.
4.18 Qualitative analysis of chlorine in solvent-soluble matter
For the qualitative analysis of chlorine in solvent-soluble matter, separate according to the provisions of 4.17.1. Pour the supernatant after the first separation into an evaporating dish and heat it in a water bath to make most of it evaporate to make a concentrated solution. Then, use the device in Figure 2 to put the concentrated solution (about 0.2-0.5g) into a test tube and slowly heat it with a burner to decompose it.
Put O. Lmoi/LAgNU, and Imal /T,IIN()Agents and administrative personnel
Brand post installation personnel and sales
Burner
Figure 2 Schematic diagram of chlorine qualitative test device
Put 5mL of 0.1mol/L silver nitrate solution and about 1mL of 1mol/L nitric acid solution in another test tube (g15mm), and use a glass tube to introduce the decomposed gas into it. While adjusting the burner, carbonize most of the sample, and shake and mix the test tube with silver nitrate solution.
If obvious white precipitation is seen, it is considered that "chlorine is present" . 4.19 Accelerated aging test
Perform according to GB/T14522. On the surface of the steel plate (150mmX70mmX0.8mm), apply a layer of phosphating primer, leave it for 4 hours, apply a layer of intermediate paint with the specified amount, leave it for 24 hours, then apply a layer of topcoat with the specified amount, leave it for 24 hours, and coat the back and edges of the plate with primer and seal the edges. Leave it for 6 days as a test sample. 4.20 Weather resistance
Perform according to GB/T1767. On one side of the steel plate (150mm×250mm×1mm) On the surface, apply a layer of organic zinc-rich primer specified by the manufacturer to make the paint film thickness after drying to 15-25um, leave it for 48 hours, then apply another layer of primer, leave it for 24 hours, then apply another layer of intermediate paint, leave it for 24 hours, and finally apply a topcoat, leave it for 7 days, as a test sample. All performance requirements listed in this standard (except weather resistance) are type inspection items, among which the state in the container, fineness, construction, drying time, paint film appearance, hiding power, 60° mirror gloss, and solid content are factory inspection items. Under normal production conditions, at least one Conduct a type inspection. The product storage period is one year from the date of production. After the storage period, it can still be used if it passes the inspection. 5 Marking, labeling, packaging
5.1 Marking
Perform in accordance with GB/T9750.
5.2 Labeling
The product should be accompanied by a label indicating the product's standard number, model, name, quantity, quality certification mark, manufacturer name, production date, and batch number. 5.3 Packaging
Perform in accordance with GB/T13491.
W.bzsoso：com2 The adhesion between the topcoat and the intermediate layer of paint shall be tested in accordance with the following provisions. 4.11.2.1 Preparation of the sample
On one side of the steel plate (about 150mm×50mm×0.3mm), apply a layer of phosphating primer, leave it for 4 hours, apply a layer of intermediate layer paint, leave it for 24 hours, apply a layer of topcoat, and leave it for 7 days. Then, conduct an accelerated aging test for 180 hours in accordance with GB/T14522. Leave the sample that has undergone the accelerated aging test for 24 hours, apply a layer of intermediate layer paint, leave it for 24 hours, and apply a layer of topcoat. Place the painted surface upward, horizontally, and dry for 7 days as a test sample. Prepare three test samples. 4.11.2.2 Operation steps
Same as 4.11.1.2.
4.11.2.3 Evaluation
If there is no peeling between the topcoat film and the intermediate paint film on two or more test panels or the peeling width along the cutting line is less than 3mm, it is considered "no abnormality". 4.12 Bending resistance
Perform in accordance with GB/T6742.
4.13 Salt water resistance
Perform in accordance with Method A of 3.1 of GB/T1763. If there is no peeling, cracking or rusting of the paint film on two or more of the three test panels, it is considered "no abnormality". 4.14 Alkali resistance
Perform in accordance with GB/T1763.
After immersing three test panels in 0.5% NaOH solution, if two or more paint films do not show cracking, peeling, softening or dissolution, and the size of the blister is less than 0.1mm and the blister area is less than 0.5%, it is considered that there is "no abnormality" in the alkali solution. 4.1560° mirror gloss
According to GB/T9754.
4.16 Solid content
According to Method A in Chapter 2 of GB/T1725. 4.17 Solvent insoluble matter
4.17.1 Operation
In a centrifuge tube of known mass, weigh about 10g (accurate to 0.0001g) of sample, add about 20mL of solvent, stir with a glass rod, use the solvent to wash the sample adhering to the glass rod into the centrifuge tube as much as possible, add solvent to 40mL, use a centrifuge to separate the solid and liquid, and pour out the upper liquid in the centrifuge tube. Repeat the above operation, using 30mL of solvent each time, and centrifuge four times in total. The composition of the solvent is: the 1st to 3rd times is a mixed solvent of xylene: methyl isobutyl ketone (volume ratio 2:1), and the 4th time is acetone. Then immerse the bottom of the centrifuge test tube in hot water, tap the test tube with a wooden board wrapped with 5 to 6 layers of gauze to separate the sediment in the test tube from the inner wall, bake the test tube at 105 to 110℃ for 2h, put it in a dryer and cool it to room temperature, weigh it, and calculate the percentage increase of the test tube. Instructions:
4 It is recommended to use Panda brand cellophane tape.
W can calculate the amount of solvent insoluble matter.
4.17.2 Calculate
Solvent insoluble matter (%), calculate according to formula (1). HG/T2798—1996
Where: A-solvent insoluble matter, expressed as mass percentage; B-centrifuge test tube increment value, g
S-mass of the sample, g.
4.18 Qualitative analysis of chlorine in solvent-soluble matter
For the qualitative analysis of chlorine in solvent-soluble matter, separate according to the provisions of 4.17.1. Pour the supernatant after the first separation into an evaporating dish and heat it in a water bath to make most of it evaporate to make a concentrated solution. Then, use the device in Figure 2 to put the concentrated solution (about 0.2-0.5g) into a test tube and slowly heat it with a burner to decompose it.
Put O. Lmoi/LAgNU, and Imal /T,IIN()Agents and administrative personnel
Brand post installation personnel and sales
Burner
Figure 2 Schematic diagram of chlorine qualitative test device
Put 5mL of 0.1mol/L silver nitrate solution and about 1mL of 1mol/L nitric acid solution in another test tube (g15mm), and use a glass tube to introduce the decomposed gas into it. While adjusting the burner, carbonize most of the sample, and shake and mix the test tube with silver nitrate solution.
If obvious white precipitation is seen, it is considered that "chlorine is present" . 4.19 Accelerated aging test
Perform according to GB/T14522. On the surface of the steel plate (150mmX70mmX0.8mm), apply a layer of phosphating primer, leave it for 4 hours, apply a layer of intermediate paint with the specified amount, leave it for 24 hours, then apply a layer of topcoat with the specified amount, leave it for 24 hours, and coat the back and edges of the plate with primer and seal the edges. Leave it for 6 days as a test sample. 4.20 Weather resistance
Perform according to GB/T1767. On one side of the steel plate (150mm×250mm×1mm) On the surface, apply a layer of organic zinc-rich primer specified by the manufacturer to make the paint film thickness after drying to 15-25um, leave it for 48 hours, then apply another layer of primer, leave it for 24 hours, then apply another layer of intermediate paint, leave it for 24 hours, and finally apply a topcoat, leave it for 7 days, as a test sample. All performance requirements listed in this standard (except weather resistance) are type inspection items, among which the state in the container, fineness, construction, drying time, paint film appearance, hiding power, 60° mirror gloss, and solid content are factory inspection items. Under normal production conditions, at least one Conduct a type inspection. The product storage period is one year from the date of production. After the storage period, it can still be used if it passes the inspection. 5 Marking, labeling, packaging
5.1 Marking
Perform in accordance with GB/T9750.
5.2 Labeling
The product should be accompanied by a label indicating the product's standard number, model, name, quantity, quality certification mark, manufacturer name, production date, and batch number. 5.3 Packaging
Perform in accordance with GB/T13491.
W.bzsoso：com2 Calculate
Solvent insoluble matter (%), according to formula (1). HG/T2798—1996
Wherein: A-solvent insoluble matter, expressed as mass percentage; B-increment value of the centrifuge test tube, g
S-mass of the sample, g.
4.18 Qualitative analysis of chlorine in solvent soluble matter
The qualitative analysis of chlorine in solvent soluble matter shall be carried out in accordance with the provisions of 4.17.1. The upper clear liquid after the first separation shall be poured into an evaporating dish and heated in a water bath to evaporate most of it to make a concentrated solution. Then, the concentrated solution (about 0.2-0.5 g) shall be placed in a test tube using the device shown in Figure 2 and slowly heated with a burner to decompose it.
Place O. Lmoi/LAgNU, and Imal /T,IIN()Agents and administrative personnel
Brand post installation personnel and sales
Burner
Figure 2 Schematic diagram of chlorine qualitative test device
Put 5mL of 0.1mol/L silver nitrate solution and about 1mL of 1mol/L nitric acid solution in another test tube (g15mm), and use a glass tube to introduce the decomposed gas into it. While adjusting the burner, carbonize most of the sample, and shake and mix the test tube with silver nitrate solution.
If obvious white precipitation is seen, it is considered that "chlorine is present" . 4.19 Accelerated aging test
Perform according to GB/T14522. On the surface of the steel plate (150mmX70mmX0.8mm), apply a layer of phosphating primer, leave it for 4 hours, apply a layer of intermediate paint with the specified amount, leave it for 24 hours, then apply a layer of topcoat with the specified amount, leave it for 24 hours, and coat the back and edges of the plate with primer and seal the edges. Leave it for 6 days as a test sample. 4.20 Weather resistance
Perform according to GB/T1767. On one side of the steel plate (150mm×250mm×1mm) On the surface, apply a layer of organic zinc-rich primer specified by the manufacturer to make the paint film thickness after drying to 15-25um, leave it for 48 hours, then apply another layer of primer, leave it for 24 hours, then apply another layer of intermediate paint, leave it for 24 hours, and finally apply a topcoat, leave it for 7 days, as a test sample. All performance requirements listed in this standard (except weather resistance) are type inspection items, among which the state in the container, fineness, construction, drying time, paint film appearance, hiding power, 60° mirror gloss, and solid content are factory inspection items. Under normal production conditions, at least one Conduct a type inspection. The product storage period is one year from the date of production. After the storage period, it can still be used if it passes the inspection. 5 Marking, labeling, packaging
5.1 Marking
Perform in accordance with GB/T9750.
5.2 Labeling
The product should be accompanied by a label indicating the product's standard number, model, name, quantity, quality certification mark, manufacturer name, production date, and batch number. 5.3 Packaging
Perform in accordance with GB/T13491.
W.bzsoso：com2 Calculate
Solvent insoluble matter (%), according to formula (1). HG/T2798—1996
Wherein: A-solvent insoluble matter, expressed as mass percentage; B-increment value of the centrifuge test tube, g
S-mass of the sample, g.
4.18 Qualitative analysis of chlorine in solvent soluble matter
The qualitative analysis of chlorine in solvent soluble matter shall be carried out in accordance with the provisions of 4.17.1. The upper clear liquid after the first separation shall be poured into an evaporating dish and heated in a water bath to evaporate most of it to make a concentrated solution. Then, the concentrated solution (about 0.2-0.5 g) shall be placed in a test tube using the device shown in Figure 2 and slowly heated with a burner to decompose it.
Place O. Lmoi/LAgNU, and Imal /T,IIN()Agents and administrative personnel
Brand post installation personnel and sales
Burner
Figure 2 Schematic diagram of chlorine qualitative test device
Put 5mL of 0.1mol/L silver nitrate solution and about 1mL of 1mol/L nitric acid solution in another test tube (g15mm), and use a glass tube to introduce the decomposed gas into it. While adjusting the burner, carbonize most of the sample, and shake and mix the test tube with silver nitrate solution.
If obvious white precipitation is seen, it is considered that "chlorine is present" . 4.19 Accelerated aging test
Perform according to GB/T14522. On the surface of the steel plate (150mmX70mmX0.8mm), apply a layer of phosphating primer, leave it for 4 hours, apply a layer of intermediate paint with the specified amount, leave it for 24 hours, then apply a layer of topcoat with the specified amount, leave it for 24 hours, and coat the back and edges of the plate with primer and seal the edges. Leave it for 6 days as a test sample. 4.20 Weather resistance
Perform according to GB/T1767. On one side of the steel plate (150mm×250mm×1mm) On the surface, apply a layer of organic zinc-rich primer specified by the manufacturer to make the paint film thickness after drying to 15-25um, leave it for 48 hours, then apply another layer of primer, leave it for 24 hours, then apply another layer of intermediate paint, leave it for 24 hours, and finally apply a topcoat, leave it for 7 days, as a test sample. All performance requirements listed in this standard (except weather resistance) are type inspection items, among which the state in the container, fineness, construction, drying time, paint film appearance, hiding power, 60° mirror gloss, and solid content are factory inspection items. Under normal production conditions, at least one Conduct a type inspection. The product storage period is one year from the date of production. After the storage period, it can still be used if it passes the inspection. 5 Marking, labeling, packaging
5.1 Marking
Perform in accordance with GB/T9750.
5.2 Labeling
The product should be accompanied by a label indicating the product's standard number, model, name, quantity, quality certification mark, manufacturer name, production date, and batch number. 5.3 Packaging
Perform in accordance with GB/T13491.
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