GB/T 5237.4: Evolution and historical versions
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Basic data | Standard ID | GB/T 5237.4-2017 (GB/T5237.4-2017) | | Description (Translated English) | Wrought aluminium alloy extruded profiles for architecture -- Part 4: Powder coating profiles | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H61 | | Classification of International Standard | 77.150.10 | | Word Count Estimation | 22,272 | | Date of Issue | 2017-10-14 | | Date of Implementation | 2018-05-01 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 5237.4-2017: Wrought aluminium alloy extruded profiles for architecture -- Part 4: Powder coating profiles
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Wrought aluminium alloy extruded profiles for architecture-Part 4. Powder coating profiles
ICS 77.150.10
H61
National Standards of People's Republic of China
Replace GB/T 5237.4-2008
Aluminum alloy building profiles
Part 4. Dusting profiles
Part 4. Powdercoatingprofiles
Released on.2017-10-14
2018-05-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Foreword
GB/T 5237 "Aluminum Alloy Building Profile" is divided into 6 parts.
--- Part 1. Substrate;
---Part 2. Anodized profiles;
---Part 3. Electrophoretic paint profiles;
---Part 4. Spray profiles;
---Part 5. Painting profiles;
--- Part 6. Thermal insulation profiles.
This part is the fourth part of GB/T 5237.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB 5237.4-2008 "Aluminum alloy building profiles Part 4. Powder coating profiles". This part and GB 5237.4-
Compared with.2008, the main technical changes except editorial changes are as follows.
--- Modified the standard name (see cover, cover of the.2008 edition);
--- Deleted the statement in the preface that "this section 4.5.3.1, 4.5.5 is mandatory, and the remaining clauses are recommended" (see.2008 edition)
Preface)
--- Revised the applicable "scope" of this section (see Chapter 1, Chapter 1 of the.2008 edition);
--- Removed the normative reference document GB/T 228-2002 (see Chapters 2 and 5.2 of the.2008 edition);
--- Removed the normative reference document JC/T 480 (see Chapters 2 and 5.4.12 of the.2008 edition);
--- Removed the normative reference file GB/T 16585 (see Chapter 2 of the.2008 edition);
--- Added normative reference document GB/T 5237.2 (see Chapters 2 and 7.3);
--- Added normative reference document GB/T 8005.3 (see Chapters 2 and 3);
--- Added normative reference document GB/T 14684 (see Chapters 2 and 5.4.12);
--- Added normative reference document JC/T 479 (see Chapters 2 and 5.4.12);
--- Added normative reference document YS/T 680-2016 (see Chapter 2 and Appendix A);
--- Amend the normative reference document GB/T 1865-1997 to GB/T 1865-2009 (see Chapter 2 and 5.4.18.1,.2008)
Year 2 and 5.4.17.1);
--- Amend the normative reference document GB/T 8013.3-2007 to a normative reference file without a chronological number (see Chapter 2,
4.6.19, 5.4.10, 5.4.13, 5.4.19 and 6.5, Chapters 2, 3, 4.2, 4.5.18, 5.4.18 and 6.4) of the.2008 edition;
--- Added normative reference document GB/T 26323 (see Chapters 2 and 5.4.16);
--- Revised guidelines for terms and definitions (see Chapter 3, Chapter 3 of the.2008 edition);
--- Revised the definition of "decorative surface" (see 3.1, 3.2 of the.2008 edition);
--- Removed the definition of "coating" (see 3.1 of the.2008 edition);
--- Removed the definition of "local film thickness" (see 3.3 of the.2008 edition);
--- Removed the definition of "minimum local film thickness" (see 3.4 of.2008 edition);
--- Added "film type and film characteristics" to the product classification (see 4.1.2);
--- Added "film appearance effect" to the product classification (see 4.1.3);
---In the product classification, the content of the "film layer performance level corresponding to the applicable environment of the profile" has been added (see 4.1.4);
--- Added "quality assurance" content (see 4.2);
--- Revised the boiling water resistance requirements and test method requirements (see 4.6.6 and 5.4.6,.2008 editions 4.5.10 and 5.4.10);
--- Revised the impact resistance requirements and test method requirements (see 4.6.7 and 5.4.7,.2008 editions 4.5.6 and 5.4.6);
--- Revised the anti-cupping requirements and test method requirements (see 4.6.8 and 5.4.8,.2008 editions 4.5.7 and 5.4.7);
--- Revised the requirements for bending resistance and test method requirements (see 4.6.9 and 5.4.9,.2008 editions 4.5.8 and 5.4.8);
--- Revised the salt spray resistance (see 4.6.15,.2008 version 4.5.15);
--- Increased the requirements for resistance to filiform corrosion and test method requirements (see 4.6.16, 5.4.16);
--- Revised the heat and humidity resistance regulations (see 4.6.17,.2008 edition 4.5.16);
--- Revised the provisions for accelerated weather resistance (see 4.6.18.1, 4.5.17.1 of the.2008 edition);
---Modified the requirements for natural weatherability (see 4.6.18.2, 4.5.17.2 of the.2008 edition);
--- Revised the requirements for chemical composition test methods (see 5.1, 5.1 of the.2008 edition);
--- Revised the requirements of the mechanical properties test method (see 5.2, 5.2 of the.2008 edition);
--- Revised the requirements of the test method for wear resistance (see 5.4.10, 5.4.9 of the.2008 edition);
--- Revised the requirements of the solvent resistance test method (see 5.4.13, 5.4.13 of the.2008 edition);
--- The salt spray corrosion resistance test method has added the requirement of "line width 1mm" (see 5.4.15, 5.4.15 of.2008 edition);
--- Modified the method of group approval (see 6.2, 6.2 of.2008 edition);
--- Increased the requirements for inspection classification (see 6.3);
--- Revised the provisions of the inspection project (see 6.4, 6.3 of the.2008 edition);
--- Increased process assurance projects (see 6.4);
--- Revised the sampling regulations (see 6.5, 6.4 of the.2008 edition);
--- Revised the judgment requirements of the test results (see 6.6, 6.5 of the.2008 edition);
--- Revised the provisions of the logo (see 7.1, 7.1 of the.2008 edition);
--- Revised the content requirements of the quality certificate (see 7.4, 7.5 of the.2008 edition);
---Modified the content requirements of the order form (or contract) (see Chapter 8, Chapter 8 of the.2008 edition);
--- Removed the appendix of the falling sand test method (see Appendix A of the.2008 edition);
--- Removed the appendix of the solvent resistance test method (see Appendix B of the.2008 edition);
--- Added an informative appendix to quality assurance (see Appendix A);
--- Added the content of the reference (see references).
This part was proposed by the China Nonferrous Metals Industry Association.
This part is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243).
This section was drafted. Fujian Minfa Aluminum Co., Ltd., Guangya Aluminum Co., Ltd., Nonferrous Metals Technology and Economic Research Institute, IV
Sichuan Samsung New Material Technology Co., Ltd., Foshan Nanhai Huahao Aluminum Profile Co., Ltd., National Nonferrous Metals Quality Supervision and Inspection Center,
Guangdong Industrial Analysis and Testing Center, Guangdong Haomei Aluminum Co., Ltd., Guangdong Xingfa Aluminum Co., Ltd., Guangdong Jianmei Aluminum Profile Factory (set
Group), Guangdong Feng Aluminum Co., Ltd., Fujian Nanping Aluminum Co., Ltd., Shandong Huajian Aluminum Group Co., Ltd., Guan
Xisheng Lianda Powder Coating Co., Ltd., Defusheng Metal Powder Co., Ltd., Shunde District, Foshan City.
The main drafters of this section. Zhu Yaohui, Pan Xuezhe, Huang Changyuan, Ge Lixin, Wang Zheng, Zhu Shuiming, Hao Xuelong, Zhan Hao, Xiang Shengqian, Chen Wenzhao,
Dai Yuexing, Chen Hui, Xu Xiaohong, Zhang Hongliang, Zhao Shida, Wu Qingsong.
The previous versions of the standards replaced by this section are.
---GB/T 5237.4-2000, GB 5237.4-2004, GB 5237.4-2008.
Aluminum alloy building profiles
Part 4. Dusting profiles
1 Scope
This part of GB/T 5237 specifies the terms and definitions, requirements, test methods, inspection rules, marking, packaging, transportation,
Storage, quality certificate and order form (or contract) content.
This section applies to thermosetting polyester, polyurethane, chlorotrifluoroethylene-vinyl ether (FEVE) powder and thermoplastic polyvinylidene fluoride
Epoxy (PVDF) powder is used as a coating for electrostatic powder coating (hereinafter referred to as profile).
Other aluminum alloy processed materials with the same application and surface treatment methods can also be referred to in this section.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 1732 paint film impact resistance test method
GB/T 1740 paint film moisture resistance test
GB/T 1865-2009 Painted and varnish artificial weathering and artificial radiation exposure filtered xenon arc radiation
GB/T 3199 Aluminum and aluminum alloy processing products packaging, marking, transportation, storage
GB/T 4957 Non-conductive coating on non-magnetic base metal, thickness measurement of eddy current method
GB/T 5237.1 aluminium alloy building profiles - Part 1.
GB/T 5237.2 aluminium alloy building profiles - part 2. anodized profiles
GB/T 6682 Analytical laboratory water specifications and test methods
GB/T 6742 Paint and varnish bending test (cylindrical shaft)
GB/T 8005.3 Aluminium and aluminium alloys - Part 3. Surface treatment
Aluminium and aluminium alloy anodized films and organic polymeric films - Part 3
GB/T 9275 Paint and varnish Buckholtz indentation test
GB/T 9276 coating natural weather exposure test method
GB/T 9286 color and varnish paint film cross-cut test
GB/T 9753 paint and varnish cupping test
GB/T 9754 Determination of 20°, 60° and 85° specular gloss of paints and varnishes without metallic pigments
Visual colorimetric test of GB/T 9761 paint and varnish
GB/T 10125 artificial atmosphere corrosion test salt spray test
GB/T 11186.2 Method of measurement of colour of coatings - Part 2
GB/T 11186.3 Method of measurement of coating colours Part 3. Calculation of colour difference
GB/T 14684 construction sand
GB/T 17671 Cement mortar strength test method (ISO method)
GB/T 26323 Paint and varnish aluminum and aluminum alloy surface coating film resistance to filamentous corrosion test
JC/T 479 Building Lime
YS/T 680-2016 Powder coating for aluminum alloy building profiles
3 Terms and definitions
The following terms and definitions as defined in GB/T 8005.3 apply to this document.
3.1
Decorative surface exposedsurfaces
Profiles that are processed, assembled into articles and mounted on buildings, visually visible surfaces (including in an open or closed state).
4 requirements
4.1 Product Classification
4.1.1 Grade, Status and Size Specifications
The grade, condition and size specifications shall comply with the provisions of GB/T 5237.l.
4.1.2 Types of membrane layers and characteristics of membrane layers
The type of film layer and the characteristics of the film layer are shown in Table 1.
Table 1 Types and characteristics of the film layer
Film type film layer code a film characteristics
Polyester powder coating GA40
The film layer is sprayed and solidified by a powder coating of saturated carboxylated polyester as a main component, which has good corrosion protection.
Performance and weather resistance
Polyurethane powder coating GU40
The film layer is spray-cured from a powder coating of saturated hydroxy polyester as a main component, and has high wear resistance.
Can, and the film is smooth, fine texture. For thermal transfer, ink permeability is superior to polyester film
Fluorocarbon powder coating GF40
The film layer is sprayed and cured by a powder coating of thermosetting FEVE resin as the main component, or by thermoplastic
The PVDF resin is formed by spraying a powder coating of the main component. Has better weather resistance,
Suitable for environments with severe corrosive atmospheres and strong solar radiation
Other powder coatings GO40 See YS/T 680-2016
a The first English letter in the film code indicates dusting; the second English letter indicates powder type, where A indicates polyester powder, U table
The polyurethane powder is shown, F is a fluorocarbon powder, and O is another powder; the Arabic numerals following the letters indicate the minimum local film thickness limit.
4.1.3 Film appearance effect
The appearance of the film layer is shown in Table 2.
Table 2 Film appearance effect
Membrane appearance effect note
The flat effect has a variety of glossy layers of low light, flat light and high light. The surface of the film is smooth and rich in color.
Table 2 (continued)
Membrane appearance effect note
Texture
effect
Sand grain
The surface of the film has a three-dimensional effect. Suitable for most aluminum door and window profiles, the film gloss should not be less than 5 gloss
unit. It is difficult to guarantee the film performance when the film gloss is lower than 5.
Wood grain
Including heat transfer wood grain and double-spray wood grain, it has the appearance of wood texture. Thermal transfer wood grain layer currently
It is mainly suitable for environments with low pollution and weak UV radiation and indoors. When applied outdoors, it should pay more attention to powder.
Strict control of quality, ink quality and process. Double-spray wood grain has a three-dimensional effect and can be applied outdoors
Hammer, wrinkles, Dali
Stone pattern, three-dimensional color carving
The surface of the film presents a variety of good three-dimensional or artistic effects. However, the weather resistance and acid and alkali resistance of this type of film are slightly
Poor, currently used mainly indoors
Metal effect
The surface of the film highlights the effect of metallic texture or metallic flicker. However, the variety and dosage of pigments have certain limitations.
Sex, the film of aluminum pigment is slightly alkaline
4.1.4 Membrane performance level and applicable environment of corresponding profiles
The performance level of the film layer is divided into I grade, II grade and III grade according to the test results of accelerated weather resistance. The performance level of the film shall be agreed between the supplier and the buyer, and
In the order form (or contract), if it is not specified, it will be supplied in Class I. See Table 3 for the applicable environment of the film performance level corresponding to the profile.
Table 3 Applicable environment of the film performance level corresponding to the profile
Film performance level profile applicable environment
Class III excellent weather resistance for environments with strong solar radiation
Class II good weatherability, suitable for environments with strong solar radiation
Class I general weather resistance, suitable for general solar radiation intensity environment
4.1.5 Tags and examples
Profile marking by product name, this part number, grade, status, section code and length, color (or color number), film performance level, film
The order of the layer code is represented. Examples of tags are as follows.
6063 grade, T5 state, section code is 421001, length of 6000mm, 3003 color, grade I film performance, film code GU40 powder
Profile, marked as.
Dusting profile GB/T 5237.4-6063T5-421001×6000 color 3003I grade GU40
4.2 Quality Assurance
4.2.1 Process
Process assurance see A.1.
4.2.2 Raw materials
Refer to A.2 for substrate quality, pretreatment reagents and powder coating quality.
4.3 Chemical composition
The chemical composition should meet the requirements of GB/T 5237.1.
4.4 Mechanical properties
Mechanical properties should meet the requirements of GB/T 5237.1.
4.5 Dimensional deviation
After the profile is removed, the dimensional deviation shall comply with the provisions of GB/T 5237.1. Dimensional changes caused by the film layer should not affect its
Assembly and use.
4.6 Film properties
4.6.1 Film thickness
4.6.1.1 The local thickness of the film on the decorative surface shall be not less than 40 μm, and the average film thickness shall be controlled between 60 μm and 120 μm. Due to the profile
The complexity of the cross-sectional shape makes it possible to have a film thickness of certain surfaces (such as internal corners, grooves, etc.) below the specified value. Have a film thickness
When he special requirements, it can be agreed between the supplier and the buyer and stated in the order form (or contract).
Note. When the film thickness is too thick, the film flexibility will be reduced.
4.6.1.2 If the non-decorative surface requires film thickness, it shall be agreed between the supplier and the buyer and specified in the order form (or contract).
4.6.2 Gloss
The gloss value and tolerance of the film shall comply with the requirements of Table 4.
Table 4 Gloss value and allowable deviation unit is gloss unit
Gloss value range gloss value allowable deviation
3~30 ±5
31~70 ±7
71~100 ±10
4.6.3 Color difference
The color of the film should be basically the same as the model agreed between the supplier and the buyer. The color difference between the monochromatic film and the sample when measured by the instrument method
ΔEab* ≤ 1.5, the color difference ΔEab* ≤ 1.5 between the same batch (referred to as the delivery batch) profile.
4.6.4 Indentation hardness
According to the indentation hardness test, the film indentation resistance should be not less than 80.
4.6.5 Adhesion
The dry adhesion, wet adhesion and boiling water adhesion of the film layer should reach level 0.
4.6.6 Resistance to boiling water
After the high-pressure water immersion test, the surface of the film layer should be free from falling off and wrinkling, but it is allowed to see the very small gas which is visible and extremely dispersed.
The bubble exists and the adhesion should reach level 0.
4.6.7 Impact resistance
4.6.7.1 After the impact test, the test layer of the grade I film properties shall have no cracking or shedding.
4.6.7.2 Grade II film properties and grade III film properties The test film layer is allowed to have a slight crack after the impact test, but the adhesion is used.
Adhesive tape larger than 10N/25mm 1) When further inspection, the surface of the film layer should be free from sticking.
1) Scotch 610 adhesive tape or Permacel 99 adhesive tape is an example of a suitable commercial product. This information is given to facilitate the use of this section.
It does not imply endorsement of these products.
Note. The anodized pretreated powder coating is not suitable for impact resistance testing.
4.6.8 Anti-cupping
4.6.8.1 After the cupping test, the test film layer of the grade I film properties shall be free from cracking or falling off;
4.6.8.2 Grade II film properties and grade III film properties The test film layer is allowed to crack slightly after the cupping test, but with adhesion
When the adhesive tape with a force greater than 10N/25mm is further inspected, the surface of the film layer should be free from sticking.
Note. The anodized pretreated spray film layer is not suitable for the anti-cupping performance test.
4.6.9 Resistance to bending
4.6.9.1 The test layer of the grade I film properties shall be free from cracking or peeling after the bending test;
4.6.9.2 Grade II film properties and grade III film properties The test film layer is allowed to have a slight crack after the bending resistance test, but the adhesion is applied.
When the adhesive tape with a force greater than 10N/25mm is further inspected, the surface of the film layer should be free from sticking.
Note. The anodized pretreated powder coating is not suitable for bending resistance testing.
4.6.10 wear resistance
After the falling sand test, the wear coefficient should be not less than 0.8L/μm.
4.6.11 Hydrochloric acid resistance
After the hydrochloric acid resistance test, there should be no bubbles or other significant changes on the surface of the film.
4.6.12 mortar resistance
After the mortar resistance test, the surface of the film layer should not fall off or other obvious changes.
4.6.13 Solvent resistance
The result of the solvent resistance test of the film layer is preferably 3 or 4 grades.
4.6.14 detergent resistance
After the detergent resistance test, there should be no blistering, shedding or other obvious changes on the surface of the film.
4.6.15 Salt spray corrosion resistance
After the salt spray corrosion test, the unilateral penetration corrosion width under the film on both sides of the scribe line shall not exceed 4 mm, and the portions on the sides of the scribe line 4 mm apart
There should be no blistering, shedding or other significant changes in the surface of the film.
4.6.16 resistance to filiformity
When the demand side has requirements for resistance to filamentous corrosion, it shall be agreed between the supplier and the buyer and specified in the order form (or contract). Membrane layer resistant to filiform corrosion
The filamentary corrosion coefficient fS after the test should not be greater than 0.3, and the length of the corrosion wire should not be greater than 2 mm.
4.6.17 Heat and humidity resistance
After the heat and humidity resistance test, the comprehensive damage level of the surface of the film layer should reach Grade 1.
4.6.18 Weather resistance
4.6.18.1 Accelerated weatherability
The accelerated weathering performance of the film shall comply with the requirements in Table 5.
Table 5 Accelerated weather resistance
Film performance level
Accelerated weatherability
Test time h
test results
Gloss retention rate a color difference
Class III 4000 ≥75% ΔEab*≤3
Class II 1000 ≥90%
ΔEab* should not be larger than YS/T 680-2016
50% of the value specified in Appendix D
Class I 1000 ≥50%
ΔEab* should not be larger than YS/T 680-2016
The values specified in Appendix D
a Gloss retention is the percentage of the gloss value after the film test relative to its pre-test gloss value.
4.6.18.2 Natural weatherability
When the demander has requirements for natural weatherability, it is advisable to select the corresponding natural weatherability level according to Table 6 and agree on the test conditions, and order
Indicated in the order (or contract).
Table 6 Natural weather resistance test results
Natural weather resistance grade test time a
Natural weathering test results
Gloss retention rate
Class III 5 years ≥ 50% ΔEab* should not be greater than the value specified in YS/T 680-2016 Appendix D
Class II 3 years ≥ 50% ΔEab* should not be greater than the value specified in YS/T 680-2016 Appendix D
Class I 1 year ≥ 50% ΔEab* should not be greater than the value specified in YS/T 680-2016 Appendix D
a Different test times can be set for different atmospheric corrosion test stations, but not less than the time specified in the table.
4.6.19 Other
When the demand side has requirements for other performances, the supplier and the buyer shall refer to GB/T 8013.3 for specific agreement and indicate in the order form (or contract).
4.7 Appearance quality
The film on the decorative surface of the profile should be smooth and uniform, allowing slight orange peeling, and no wrinkles, flow marks, bubbling, cracks, etc. are allowed.
Defects used.
5 Test methods
5.1 Chemical composition
The chemical composition analysis method is carried out in accordance with the provisions of GB/T 5237.1. The film layer on the surface of the sample should be removed before the test.
5.2 Mechanical properties
The test method of mechanical properties shall be carried out in accordance with the provisions of GB/T 5237.1, and the film layer on the surface of the sample shall be removed before the test.
5.3 Dimensional deviation
The method for detecting the dimensional deviation is carried out in accordance with the provisions of GB/T 5237.1. The film layer on the surface of the sample should be removed before testing.
5.4 Film properties
5.4.1 Film thickness
The method for detecting the thickness of the film layer is carried out in accordance with the provisions of GB/T 4957.
5.4.2 Gloss
According to the provisions of GB/T 9754, measured by 60° angle of incidence.
5.4.3 Color difference
The measurement of chromatic aberration is usually carried out by visual inspection and instrumental method, and the visual method is carried out in accordance with the provisions of GB/T 9761. Instrument method
The provisions of GB/T 11186.2 and GB/T 11186.3 are carried out. The monochromatic film arbitration test uses an instrument method.
5.4.4 Indentation hardness
According to the provisions of GB/T 9275.
5.4.5 Adhesion
5.4.5.1 Dry adhesion
5.4.5.1.1 According to the provisions of GB/T 9286, the cross-cut spacing is 2mm.
5.4.5.1.2 Cover the film on the cross-cut film with an adhesive tape with an adhesion greater than 10N/25mm, and press it to remove the air under the adhesive tape.
The adhesive tape is quickly pulled up at an angle perpendicular to the surface of the film and rated acc...
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