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GB/T 12967.5-2022: Test methods for anodic oxidation coatings and organic polymer coatings on aluminium and aluminium alloys - Part 5: Assessment of resistance to cracking
Status: Valid GB/T 12967.5: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 12967.5-2022 | English | 279 |
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Test methods for anodic oxidation coatings and organic polymer coatings on aluminium and aluminium alloys - Part 5: Assessment of resistance to cracking
| Valid |
GB/T 12967.5-2022
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| GB/T 12967.5-2013 | English | 359 |
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Test methods for anodic oxidation coatings of aluminium and aluminium alloys -- Part 5: Assessment of resistance of anodic oxidation coatings to cracking by deformation
| Obsolete |
GB/T 12967.5-2013
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| GB/T 12967.5-1991 | English | 199 |
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Anodizing of aluminium and aluminium alloys--Assessment of resistance of anodic oxidation coatings to cracking by deformation
| Obsolete |
GB/T 12967.5-1991
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PDF similar to GB/T 12967.5-2022
Basic data | Standard ID | GB/T 12967.5-2022 (GB/T12967.5-2022) | | Description (Translated English) | Test methods for anodic oxidation coatings and organic polymer coatings on aluminium and aluminium alloys - Part 5: Assessment of resistance to cracking | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H20 | | Word Count Estimation | 14,179 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 12967.5-2022: Test methods for anodic oxidation coatings and organic polymer coatings on aluminium and aluminium alloys - Part 5: Assessment of resistance to cracking
---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.
Test methods for anodic oxidation coatings and organic polymer coatings on aluminium and aluminium alloys - Part 5.Assessment of resistance to cracking
ICS 25.220.20
CCSH20
National Standards of People's Republic of China
Replacing GB/T 12967.5-2013
Aluminum and aluminum alloy anodized films and organic polymer films
Test methods part 5.determination of crack resistance
Published on 2022-03-09
2022-10-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
drafted.
This document is part 5 of GB/T 12967 "Testing Methods for Anodic Oxidation Films and Organic Polymer Films of Aluminum and Aluminum Alloys". GB/T 12967
The following sections have been published.
--- Part 1.Determination of abrasion resistance;
--- Part 3.Salt spray test;
--- Part 4.Determination of light and heat resistance;
--- Part 5.Determination of rupture resistance;
--- Part 6.Color difference and appearance quality.
This document replaces GB/T 12967.5-2013 "Evaluation of crack resistance of anodic oxide films by deformation method for anodic oxidation of aluminum and aluminum alloys".
Compared with GB/T 12967.5-2013, except for structural adjustment and editorial changes, the main technical changes are as follows.
--- Changed the applicable object of "scope", adding aluminum and aluminum alloy anodized composite films and organic polymer films (see Chapter 1,
Chapter 1 of the.2013 edition);
--- Added "normative references" (see Chapter 2);
--- Added "Terms and Definitions" (see Chapter 3);
--- Changed the "Method Overview" (see Chapter 4, Chapter 2 of the.2013 edition);
--- Added the requirements for materials in "Reagents and Materials" (see Chapter 5, Chapter 3 of the.2013 edition);
--- Added impact test equipment, cupping test equipment, type I bending test equipment, type II bending test equipment,
Contents of crushed stone impact test equipment, sharp tool processing test equipment, micrometers and rulers (see Chapter 6,.2013 edition of 4
chapter);
--- Changed the "sample" (see Chapter 7, 5.1 of the.2013 edition);
--- Changed the "test steps" (see Chapter 8, 5.2 of the.2013 edition);
--- Changed the "result representation" (see Chapter 9, Chapter 6 of the.2013 edition);
--- Changed the content of "Test Report" (see Chapter 10, Chapter 7 of the.2013 edition).
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China Nonferrous Metals Industry Association.
This document is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243).
This document is drafted by. Guohe General Testing Evaluation and Certification Co., Ltd., Guangdong Haomei New Materials Co., Ltd., Guangdong Jianke Innovation Technology
Technology Research Institute Co., Ltd., Guangdong Guanglu Aluminum Profile Co., Ltd., China Automotive Research Institute (Tianjin) Automotive Engineering Research Institute Co., Ltd., Fujian Minfa Aluminum
Industry Co., Ltd., Liaoning Zhongwang Group Co., Ltd., Sichuan Samsung New Material Technology Co., Ltd., Guangdong Weiye Aluminum Factory Group Co., Ltd.
Company, Shanghai Representative Office of Copano Laboratory Equipment Co., Ltd., Foshan Quality Measurement Supervision and Testing Center, National Standard (Beijing) Inspection and Certification Co., Ltd.
company.
The main drafters of this document. Zhang Wenmei, Fan Zhigang, Cai Yuehua, Zhang Kai, Liu Chang, Meng Xianming, Wu Hao, Huang Changyuan, Li Honglin, Hao Xuelong,
Wang Zheng, Liang Meichan, Zhang Heng, Li Zhijin.
This document was first published in.1991 and revised for the first time in.2013, this time being the second revision.
Introduction
Aluminum and aluminum alloy anodic oxide films and organic polymer films are mainly used for the protection and decoration of aluminum and aluminum alloy surfaces.
It is widely used in many fields such as furniture, home appliances, decoration, food packaging, mechanical parts and functional materials. GB/T 12967.5 "Aluminum and aluminum alloy anode
Test methods for oxide films and organic polymer films - Part 5.Determination of crack resistance
Test method for crack resistance of composite films, which can be used as a rapid evaluation method for aluminum and aluminum alloy anodic oxide films and organic polymer films subjected to mechanical deformation.
The ability of the surface film to resist deformation and rupture can also be used to compare the process quality of samples with similar films.
GB/T 12967 "Testing Methods for Anodic Oxidation Films and Organic Polymer Films of Aluminum and Aluminum Alloys" and GB/T 8014.1 "Aluminum and Aluminum Alloy Anodes"
Measurement method of oxide film thickness - Part 1.Measurement principle
Measurement method of degree of hardness - Part 2.Mass loss method, GB/T 8014.3 "Measurement method of thickness of anodic oxide film of aluminum and aluminum alloy
Part 3.Spectral beam microscopy, GB/T 8752 "Continuity test method for anodized thin anodic oxide films of aluminum and aluminum alloys"
Acid copper method", GB/T 8753.1 "Evaluation method for sealing quality of anodized oxide films of aluminum and aluminum alloys - Part 1.Acid etching weight loss
Law", GB/T 8753.3 "Assessment Method for Sealing Quality of Anodized Oxidation Films of Aluminum and Aluminum Alloys Part 3.Admittance Method",
GB/T 8753.4 "Assessment Method for Sealing Quality of Anodized Oxidation Films of Aluminum and Aluminum Alloys Part 4.Staining Spots After Acid Treatment
Law", GB/T 8754 "Determination of Insulation Properties of Anodized Films of Aluminum and Aluminum Alloys and Organic Polymer Films", GB/T 20503 "Aluminum and Aluminum Alloys"
Determination of Specular Reflectance and Specular Gloss of Anodized Anodized Films", GB/T 20504 "Aluminium and Aluminum Alloy Anodic Oxidation
Standard method for the determination of image clarity of chemical film", GB/T 20505 "Determination of surface reflection characteristics of anodized anodic oxide film of aluminum and aluminum alloys"
The Definite Integrating Sphere Method together constitutes the standard system of detection methods for aluminum and aluminum alloy anodic oxide films and organic polymer films.
GB/T 12967 consists of five parts.
--- Part 1.Determination of abrasion resistance. The purpose is to establish a method for evaluating the wear resistance of the anodic oxide film and the organic polymer film layer.
--- Part 3.Salt spray test. The purpose is to establish the salt spray corrosion resistance evaluation of anodic oxide film and organic polymer film layer
method.
--- Part 4.Determination of light and heat resistance. The purpose is to establish the weather resistance and resistance of the anodic oxide film and the organic polymer film layer.
Thermal performance evaluation method.
--- Part 5.Determination of rupture resistance. The purpose is to establish the evaluation of crack resistance of anodic oxide film and organic polymer film layer
method.
--- Part 6.Color difference and appearance quality. The purpose is to establish the color difference and appearance quality of the anodized film and organic polymer film layer
Evaluation method.
In.1991, my country identically adopted ISO 3211.1977 "Deformation method for anodizing aluminum and aluminum alloys to evaluate the crack resistance of anodic oxide films.
For the first time, GB/T 12967.5-1991 "Evaluation of crack resistance of anodic oxide films by deformation method for anodic oxidation of aluminum and aluminum alloys" was formulated.
In.2013, my country revised and adopted ISO 3211.2010 "Evaluation of crack resistance of anodic oxide films by deformation method for anodizing of aluminum and aluminum alloys",
Released GB/T 12967.5-2013.GB/T 12967.5-2013 replaces GB/T 12967.5-1991, adds reagents, repairs
Changed the requirements for the base of the instrument, and increased the requirements for the service life of the sample and the soaking solution. In recent years, various surface film preparation techniques have been
The anodic oxide film and organic polymer film are more and more widely used in aluminum alloy products, and the development prospect is broad, and the existing standards cannot meet the requirements.
Evaluation requirements for crack resistance of different types of membranes, so it is necessary to specify the crack resistance of different types of membranes in GB/T 12967.5
Test methods to meet the testing and evaluation needs of different film products.
This document focuses on supplementing the impact test, cupping test, bending test, flexibility test, crushed stone impact test, positive
Sharp tool processing test of anodized film, anodized composite film and organic polymer film.
Aluminum and aluminum alloy anodized films and organic polymer films
Test methods part 5.determination of crack resistance
1 Scope
This document gives an overview of the methods for the determination of crack resistance of aluminum and aluminum alloy anodic oxide films and organic polymer films, and specifies reagents, materials, and
materials, equipment, samples, test procedures, results presentation and test reports, etc.
This document is applicable to the determination of crack resistance of aluminum and aluminum alloy anodic oxide films, anodic oxide composite films, and organic polymer films.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document.
GB/T 8005.3 Terms of Aluminum and Aluminum Alloys Part 3.Surface Treatment
GB/T 8170 Numerical Rounding Rules and Representation and Judgment of Limit Values
3 Terms and Definitions
Terms and definitions defined in GB/T 8005.3 apply to this document.
4 Method overview
The following tests are carried out under the conditions of controlled laboratory environment, specified equipment and fixed test procedures, and the samples under different conditions are investigated.
The deformation of the film and the rupture of the film under the stress state were used to evaluate the rupture resistance of the product under different test conditions.
---Bending deformation rate test. bend the sample along the spiral engraved with the deformation index, and observe in the direction of the deformation index from small to large.
Observe, mark the position of the first transverse film crack in the sample, and then convert the radius of curvature of the sample, and then calculate the
Bending deformation rate. The method is suitable for the bending deformation rate of aluminum and aluminum alloy anodic oxide films (thickness generally does not exceed 5μm).
Determination.
---Impact test. place the weight of the specified mass at an appropriate height and drop it freely, impact the surface or back of the film layer of the sample, and check the change.
Shape position and surrounding film changes. The method is suitable for the determination of the impact resistance of organic polymer films, but not for anodic oxygen
Determination of the impact resistance of chemical films or organic polymer films pretreated by anodization.
--- Cupping test. use a die of specified specification to fix the sample, and move the punch to the specified depth along the fixed path to make the sample change.
Shape, check the changes of the film on the convex part of the sample and around it. The method is suitable for the determination of the anti-cupping properties of organic polymer films.
---Bending test. Bend the sample under the specified radius of curvature, and visually observe the change of the film layer at the bending part, or use adhesive tape.
Check the film surface for sticking phenomenon. The method is suitable for the determination of the bending resistance of organic polymer films.
---Flexibility test. Bend the sample 180° to fit, and repeatedly wrap it inward and bend 180° to fit, so as to continuously improve the bending half of the film.
Diameter, until the film layer does not crack or fall off for the first time, and the flexibility of the film layer is evaluated according to the number of bending times. The method is suitable for evaluating organic polymers
The flexibility of the composite film layer.
--- Crushed stone impact test. under the specified conditions, make the crushed stone impact the surface of the sample, remove the debris according to the dimples in the selected evaluation area
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