GB 5237.3-2004 Aluminium alloy building profiles Part 3: Electrophoretic coating profiles
Some standard content:
ICS 77.150.10
National Standard of the People's Republic of China
GB5237.3—2004
Replaces GB/T5237.3-2000
Aluminium alloy extruded profiles for architecture
Part 3: Electrophoretic coating profiles
Wrought aluminium alloy extruded profiles for architecturePart 3: Electrophoretic coating profilesIssued on 2004-11-01
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaAdministration of Standardization of the People's Republic of China
Digital anti-counterfeiting
Implementation on 2005-03-01
Part of the contents of Table 2 and Table 3 of this Part are mandatory. The remaining clauses are recommendatory. GB5237 "Aluminum Alloy Building Profiles" is divided into six parts: Part 1: Base Materials
Part 2: Anodized and Colored Profiles
Part 3: Electrophoretic Painted Profiles
Part 4: Powder Sprayed Profiles
-Part 5: Fluorocarbon Paint Sprayed Profiles
-Part 6: Thermal Insulation Profiles
This part is Part 3 of GB5237.
GB5237.3-2004
This part is a revision of GB/T5237.3-2000. This revision changes the nature of the standard from a recommended standard to a mandatory standard.
This part replaces GB/T5237.3-2000 from the date of implementation. This part is proposed by the China Nonferrous Metals Industry Association. This part is under the jurisdiction of the National Technical Committee for Standardization of Nonferrous Metals. The main drafting units of this part are: South China Product Quality Supervision and Inspection Center of China Nonferrous Metals Industry, Guangdong Xingfa Innovation Co., Ltd., Fujian Nanping Aluminum Co., Ltd., Fujian Minfa Aluminum Co., Ltd. The main drafters of this part are: Chen Shichang, Chen Hongzai, Zhang Zhongxing, Wu Xikun, Zhang Xuehui, Pan Shijian, Ren Shanwu, Wu Shiwen, Chen Sumei. This part is interpreted by the National Technical Committee for Standardization of Nonferrous Metals. The previous versions of the standards replaced by this part are: GB/T5237.3-2000.YS/T100-1997. 1 Scope
Aluminum alloy building profiles
Part 3: Electrophoretic paint profiles
GB5237.3-2004
This part specifies the requirements, test methods, inspection rules and packaging, marking, transportation and storage of electrophoretic paint aluminum alloy building profiles. This part applies to aluminum alloy hot extruded profiles (hereinafter referred to as electrophoretic profiles) for use in the construction industry, with surfaces treated with a composite of anodizing and electrophoretic painting (water-soluble varnish). Hot extruded pipes with the same purpose and surface treatment can also refer to this part. Aluminum alloy hot extruded profiles with the same surface treatment used in other industries can also refer to this part. 2 Normative references
The clauses in the following documents become clauses of this part through reference to this part. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, all parties that reach an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version applies to this part. GB/T629 Chemical reagent Sodium hydroxide
GB/T1766 Paints and varnishes - Rating method for coating ageing GB/T1865
GB/T3199
GB/T4957
GB/T6461
GB/T6462
GB/T6682
GB/T6739
GB/T8014
GB/T9286
GB/T10125
Paints and varnishes - Artificial weathering and artificial radiation exposure (filtered xenon arc radiation) Packaging, marking, transportation and storage of aluminium and aluminium alloy processed products - Thickness measurement of non-conductive covering layers on non-magnetic metal substrates - Eddy current method - Aluminium alloy building profiles - Part 1: Base material
Aluminium alloy building profiles Part 2: Anodised and coloured profiles Rating of samples and test pieces after corrosion tests of metal and other inorganic coatings on metal substrates GB/T16585
3 Definitions
Metal and oxide coating cross-sectional thickness Microscopic measurement method Analytical laboratory water specifications and test methods Coating hardness Pencil determination method
Aluminium and aluminium alloy anodic oxidation Definition of anodic oxide film thickness and relevant provisions for measuring thickness Cross-cut test of paint and varnish paint film
Artificial atmosphere corrosion test Salt spray test
Artificial weathering (fluorescent ultraviolet lamp) test method for vulcanised rubber Decorative surfaces exposed surfaces
Decorative surfaces refer to the surfaces that can still be seen after the profiles are processed into doors, windows and curtain walls. It includes the surfaces that can be seen when the windows, vents, doors or panels are open and closed. 3.2
Composite coatings
A film with corrosion resistance, weather resistance and wear resistance formed by electrophoretic painting after anodizing treatment on the profile surface. 1
GB5237.3—2004
Local thickness localthickness
The average value of the film thickness measured several times (not less than 3 times) on a certain inspection area of no more than 1cm2 on the profile decorative surface.
Average thickness averagethickness
The average value of the local film thickness measured at a certain location (not less than 5 locations) on the profile decorative surface. 4) Contents of order form or contract
Order form or contract for products listed in this standard shall include the following contents: a) Product name:
b) Alloy grade;
c) Supply status;
d) Product specifications:
e) Dimensions and their allowable deviation accuracy level;
f) Composite film thickness level and color;
g) Weight;
h) Number of this standard:
i) Other requirements.
5 Requirements
5.1 Product classification
5.1.1 Grade, state, specification and surface treatment method The alloy grade, state and specification of electrophoresis profiles shall comply with the corresponding provisions of GB5237.1. The surface treatment method shall comply with the provisions of Table 1. Table 1
Surface treatment
Anodizing plus electrophoretic painting
Anodizing, electrolytic coloring plus electrophoretic painting 5.1.2 Marking example
The marking of the product is indicated in the order of product name, alloy grade, supply status, specification (consisting of profile code and cut-to-length), color, composite film thickness level and standard number. The marking example is as follows: Made of 6063 alloy, supply status is T5, profile code is 421001, cut-to-length is 6000nm, surface treatment method is anodizing electrolytic bronze color, plus electrophoretic painting, composite film thickness level is A-level profile for external windows, marked as: External window profile 6063-T5421001X6000 bronze AGB5237.3--2004. 5.2 Substrate quality
The substrate used for electrophoretic profiles should comply with the provisions of GB5237.1. 5.3 Chemical composition and mechanical properties of the product
After the film layer is removed, the chemical composition and room temperature mechanical properties of the electrophoretic profile shall comply with the provisions of GB5237.1. 5.4 Allowable size deviation
The allowable size deviation of the electrophoretic profile (including the composite film) shall comply with the provisions of GB5237.1. 5.5 Composite quality
5.5.1 Thickness
The thickness of the composite film shall comply with the provisions of Table 2. If the contract does not specify the thickness grade of the composite film, it shall be supplied as Grade B. 2
Anodic oxide film
Local film thickness/μm
Average film thickness/μm
Local film thickness/μm
GB5237.3—2004
Composite film
Local film thickness/μm
Note 1: Outdoor building components in harsh and severe environments should use Class A profiles, and outdoor building components or vehicle components in normal environments can use Class B profiles.
Note 2: The composite film indicators in the table are mandatory. 5.5.2 The corrosion resistance of the anodic oxide film, the adhesion and hardness of the paint film, and the corrosion resistance and wear resistance of the composite film The corrosion resistance of the anodic oxide film, the adhesion and hardness of the paint film, and the corrosion resistance and wear resistance of the composite film shall comply with the provisions of Table 3. Table 3
Anodized film
Corrosion resistance (CASS test)
Film thickness level
Test time/
Protection level/
Adhesion
CASS test
Time/
Composite film
Corrosion resistance
Alkali resistance
Protection level/
Time/
Protection level!
Abrasion resistance/
≥3000
≥2750
Note 1: The anodized film referred to in the table refers to the oxide film formed by anodizing the profile before painting. Its corrosion resistance should be guaranteed during the processing and inspected regularly. It is not an item for the final inspection of the product. Note 2: The adhesion level in the table is mandatory. 5.5.3 Color and color difference
The color and color difference should comply with the physical standard and allowable deviation determined by the supply and demand parties. 5.5.4 Artificially accelerated weathering resistance
After the composite film is subjected to the artificial accelerated aging test under xenon lamp irradiation, there should be no powdering phenomenon (level 0), the degree of gloss loss should reach at least level 1 (loss rate ≤15%), and the degree of discoloration should reach at least level 1. With the agreement of the supply and demand parties, other artificial accelerated aging test methods can also be used for testing. The specific requirements should be agreed upon by the supply and demand parties and indicated in the contract. The fluorescent ultraviolet radiation method has good acceleration performance and is particularly suitable for production inspection. When using it, attention should be paid to the comparative relationship with the xenon lamp irradiation method.
5.5.5 Boiling water resistance
After boiling in deionized water at ≥95℃ for 5h, there should be no wrinkles, cracks, bubbles, shedding and discoloration on the surface of the paint film. 5.6 Appearance quality
The appearance quality of the profile before painting shall comply with the relevant provisions of GB5237.2. The paint film after painting should be uniform and intact, and no defects such as wrinkles, cracks, bubbles, flow marks, inclusions, stickiness and paint film shedding that affect use are allowed. However, it is allowed to be partially free of paint film within 80mm of the end of the electrophoretic profile.
CB5237.3-2004
6 Test methods
6.1 Chemical composition arbitration analysis method, room temperature mechanical performance test and dimensional deviation measurement method Chemical composition arbitration analysis method, room temperature mechanical performance test and dimensional deviation measurement method shall be carried out in accordance with GB5237.1. 6.2 Composite film test method
The test shall be carried out after the paint film is cured and placed for 24 hours. 6.2.1, Color and color difference inspection method The specified color and color difference shall be inspected by comparing with the sample specified in the contract under the condition of scattered light with normal vision. 6.2.2 Anodized film thickness determination method, composite film thickness determination method The determination of anodized film and composite film thickness shall be carried out in accordance with the provisions of GB/T4957 when the eddy current method is used, and in accordance with the provisions of GB/T6462 when the cross-section microscopy method is used. The cross-section microscopy method shall be used for arbitration. The measurement points for each profile shall not be less than 5, and the specific provisions for measurement shall refer to GB/T8014.
6.2.3 Determination method of paint film thickness
The paint film thickness can be determined by the eddy current method in accordance with the provisions of GB/T4957, or by the cross-sectional microscopy method in accordance with the provisions of GB/T6462. The arbitration test adopts the cross-sectional microscopy method. When the eddy current method is used for determination, it can be carried out in any of the following order: a) Measure the thickness of the composite film, and then subtract the thickness of the anodic oxide film measured in 6.2.2 to obtain the paint film thickness. b) First measure the thickness of the composite film, then remove the paint film with a stripper or related equipment, and then measure the thickness of the anodic oxide film. The difference between the two is the paint film thickness.
6.2.4 Test method for corrosion resistance of anodic oxide film (CASS test) The corrosion resistance test of anodic oxide film adopts the CASS test in accordance with the provisions of GB/T10125. The sample is prepared before painting. The sample size is 751mmX150mm. The test results are evaluated in accordance with GB/T6461. The defect area after the test and the corresponding protection level are shown in Table 4.
Defect area
>0.02%~0.05%
>0.05%~~0.07%
>0. 07% ~0. 10%
>0. 10% ~0. 25%
6.2.5Test method for adhesion of paint film
Protection level/R
The adhesion test of paint film shall be determined according to the tape method in GB/T9286, and the grid spacing shall be 1mm6.2.6Test method for hardness of paint film
The hardness test of paint film shall be carried out according to the provisions of GB/T6739, and the test results shall be evaluated according to the scratching of the paint film. 6.2.7 Test method for corrosion resistance of composite film
6.2.7.1 CASS test
The CASS test shall be carried out in accordance with the provisions of GB/T10125. When cleaning the test piece, solvents such as acetone and methyl ketone that may damage the paint film shall not be used. The specimen size and the evaluation of the test results are the same as the corresponding provisions in 6.2.4. 4
6.2.7.2 Alkali resistance test
GB5237.3—2004
Before the test, gently wipe off the dirt on the surface of the specimen with alcohol. On the effective surface, fix a glass (or synthetic resin) ring with an inner diameter of 32mm and a height of 30mm with vaseline or paraffin, and seal its periphery. The test temperature is 20℃±2℃. During the test, keep the specimen horizontal, inject 5g/1. sodium hydroxide aqueous solution to 1/2 of the ring height, and cover it with a glass plate or synthetic resin plate. After reaching the time specified in Table 3, remove the glass ring, wash it gently with water, place it indoors for 1 hour, and then draw a circle on the sample that is concentric with the ring and has a diameter of 30mm. Use a 10-15 times magnifying glass to observe the corrosion inside the circle, and evaluate the protection level according to the provisions of GB/T6461. The level corresponding to the percentage of different total defect areas shall be in accordance with the corresponding provisions in 6.2.4. The sodium hydroxide solution shall be prepared with the sodium hydroxide specified in GB/T629 and the third-grade water specified in GB/T6682. 6.2.8 Test method for boiling water resistance of composite membranes The test method for boiling water resistance of composite membranes is as follows: The test uses the third-grade water specified in GB/T6682. Prepare a 1L beaker for each test piece (100mm×70mm), fill it with water to a depth of about 80mm, and put 2-3 clean broken porcelain pieces in the beaker. Heat the bottom of the beaker, and after the water boils, hang the test piece about 60mm below the water surface, continue to boil for 5 hours, and then take it out for observation. The paint film on the periphery of the test piece and the part within about 10mm from the water surface is not the object of observation and evaluation. During the test, the water should evaporate and can be replenished with boiling water at any time to keep the water surface at a depth of about 80mm as much as possible. The water temperature should not be lower than 95℃ during the entire test. 6.2.9 Test method for wear resistance of composite film
The wear resistance of composite film is determined according to the method specified in Appendix A of GB5237.2. The wear resistance is evaluated by the mass of abrasive required to wear through the film.
6.2.10 Test method for artificial accelerated weathering resistance of composite film The xenon arc radiation aging test is carried out according to the provisions of Method 1 in GB/T1865, with a black standard temperature of 65℃±2℃ and continuous irradiation for 300h. After the test, wipe dry and rate according to the provisions of GB/T1766. The artificial weathering test of fluorescent ultraviolet lamp is carried out according to the method specified in GB/T16585.
6.3 Inspection method for appearance quality
The inspection of appearance quality is carried out by visual inspection and hand touch. The inspection of flow marks, wrinkles and inclusions should be carried out with normal vision under natural scattered light conditions.
7 Inspection rules
7.1 Inspection and acceptance
7.1.1 The electrophoresis profile shall be inspected by the supplier's technical supervision department to ensure that the product quality meets the requirements of this standard (or order contract) and fill in the quality certificate.
7.1.2 The purchaser may inspect and re-test the received products according to the provisions of this standard. If the re-test results do not meet the requirements of this standard (or order contract), the purchaser may submit a written request to the supplier for a solution through negotiation between the purchaser and the supplier. Objections to appearance quality and dimensional deviation shall be raised within one month from the date of receipt of the product, and objections to other performance shall be raised within three months from the date of receipt of the product. If arbitration is required, arbitration sampling shall be conducted by the purchaser and the supplier and the buyer jointly. 7.2 Batch
Electrophoresis profiles should be accepted in batches. Each batch should consist of profiles of the same alloy, same state, same specification and same composite film grade. The batch weight is not limited.
7.3 Inspection Items
Each batch of electrophoretic profiles shall be inspected for chemical composition, room temperature mechanical properties, dimensional deviation, appearance quality, and color before leaving the factory. Color difference, local originality of composite film, film adhesion, and film hardness shall be inspected. Other properties shall be inspected regularly (at least once a year). Generally, no inspection is required, but the supplier must ensure that the product can meet the corresponding quality requirements. If the user requires inspection and testing, it shall be indicated in the contract. 5
GB5237.3—2004
7.4 Sampling
Product sampling shall comply with the provisions of Table 5.
Inspection items
Chemical composition, mechanical properties, dimensional difference Anodized film, paint film and composite film
Appearance quality, color and color difference
Corrosion resistance of anodized film, adhesion and hardness of paint film and corrosion resistance, wear resistance, weather resistance and boiling water resistance of composite film
Batch range
11~200
201~300
301~500
501~800
Above 800
7.5 Determination of inspection results
Sampling regulations
According to the provisions of GB5237.1
Sampling according to Table 6
Inspection one by one
Take 2 profiles for each batch||tt ||Take 1 sample for each piece
Number of random samples
7.5.1 If the chemical composition is unqualified, the batch will be judged as unqualified. Required chapter numberwww.bzxz.net
5.6.5.5.3
5.5.2,5.5.4,
Chapter number of test method
6.2.2,6.2.3
6.3,6.2.1
6.2.4.6.2.5,6.2.6,
6.2.7,6.2,9,6,2.10,
Unit is piece
Upper limit of unqualified number
7.5.2 If the size deviation, appearance quality, color and color difference of electrophoretic profile are unqualified, the single piece will be judged as unqualified. It is allowed to inspect each piece, and the qualified ones will be delivered.
7.5.3 When the number of unqualified samples of oxide film thickness, paint film thickness and composite film thickness of electrophoretic profiles exceeds the upper limit of the number of unqualified products allowed in Table 6, the batch is judged to be unqualified. However, the supplier is allowed to inspect each piece and deliver the qualified ones. 7.5.4 When any sample fails the test results of other properties of the coating, the batch is judged to be unqualified. 7.5.5 When any sample fails the mechanical property test, double the number of samples (including the original unqualified profiles) should be taken from the batch of products for repeated testing. If there are still unqualified samples after repeated testing, the batch is judged to be unqualified. 8 Marking, packaging, transportation, storage
8.1 The qualified electrophoresis profiles shall be labeled with the following contents (or with a certificate): a) supplier name and address;
b) inspection stamp of the supplier's quality inspection department;
c) alloy grade and state;
d) profile name and specification (the name of the profile for external door and external window shall indicate the words "external door" or "external window"); e) composite film thickness level and color;
f) production date or batch number,
g) this standard number;
h) production license number.
8.2 The packaging box markings of electrophoresis profiles shall comply with the provisions of GB/T3199. 8.3 Electrophoresis profiles shall be packed in bundles with paper, and their decorative surfaces shall be protected by padding paper or foam plastics. 8.4 The transportation and storage of electrophoresis profiles shall comply with the provisions of GB/T3199. 8.5 Each batch of profiles should be accompanied by a product quality certificate, which should indicate: a) supplier name; b) product name and specifications; c) alloy grade and state; d) type of paint; e) batch number or production date; f) weight or number of pieces; g) various analysis and test results and the stamp of the supplier's quality inspection department; h) this standard number; i) date of manufacture (or packaging date).
GB5237.3—2004
GB5237.3-2004
National Standard of the People's Republic of China
Aluminum Alloy Building Profiles
Part 3: Electrophoretic Painted Profiles
GB5237.3--2004
Published and distributed by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045||tt ||Website: bzcbs.com
Tel: 6852394668517548
Printed by China Standard Press Qinhuangdao Printing Factory Distributed by Xinhua Bookstores in various places
Format: 880×12301/16 Printing sheet: 0.75 Word count: 15,000 words First edition in January 2005 First printing in January 2005 If there is any printing error, the distribution center of our company will replace it. Copyright is exclusive. Infringement will be investigated.
Report telephone: (010) 685335333-2004
National Standard of the People's Republic of China
Aluminum Alloy Building Profiles
Part 3: Electrophoretic Painted Profiles
GB5237.3--2004
Published and distributed by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Website: bzcbs.com||t t||Tel: 6852394668517548
Printed by China Standard Press Qinhuangdao Printing Factory Distributed by Xinhua Bookstores in various places
Format 880×12301/16 Printing sheet 0.75 Word count 15,000 words First edition in January 2005 First printing in January 2005 If there is any printing error, the distribution center of our company will replace it. Copyright infringement will be investigated
Report telephone: (010) 685335333-2004
National Standard of the People's Republic of China
Aluminum Alloy Building Profiles
Part 3: Electrophoretic Painted Profiles
GB5237.3--2004
Published and distributed by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Website: bzcbs.com||t t||Tel: 6852394668517548
Printed by China Standard Press Qinhuangdao Printing Factory Distributed by Xinhua Bookstores in various places
Format 880×12301/16 Printing sheet 0.75 Word count 15,000 words First edition in January 2005 First printing in January 2005 If there is any printing error, the distribution center of our company will replace it. Copyright infringement will be investigated
Report telephone: (010) 68533533
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