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GB/T 42514-2023: Corrosion evaluation for anodic oxide coatings and organic polymer coatings on aluminium and its alloys - Chart method
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Corrosion evaluation for anodic oxide coatings and organic polymer coatings on aluminium and its alloys - Chart method
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GB/T 42514-2023
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Basic data | Standard ID | GB/T 42514-2023 (GB/T42514-2023) | | Description (Translated English) | Corrosion evaluation for anodic oxide coatings and organic polymer coatings on aluminium and its alloys - Chart method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H21 | | Classification of International Standard | 25.220.20 | | Word Count Estimation | 19,123 | | Date of Issue | 2023-05-23 | | Date of Implementation | 2023-12-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 42514-2023: Corrosion evaluation for anodic oxide coatings and organic polymer coatings on aluminium and its alloys - Chart method
---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.
ICS 25:220:20
CCSH21
National Standards of People's Republic of China
Aluminum and aluminum alloy anodized film and organic polymer film
Corrosion Rating Chart Method
Released on 2023-05-23
2023-12-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
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 for Standardization Documents"
drafting:
This document was drafted with reference to ISO 8993:2018 "Aluminum and Aluminum Alloy Anodic Oxidation Pitting Evaluation Rating System Chart Method", the consistency degree
degrees are not equivalent:
Please note that some contents of this document may refer to patents: 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: National Standard (Beijing) Inspection and Certification Co:, Ltd:, Dongliang Aluminum Co:, Ltd:, Fujian Minfa Aluminum Co:, Ltd:
Division, Guangdong Weiye Aluminum Factory Group Co:, Ltd:, Tianjin Xinailong Technology Co:, Ltd:, Jiangyin Hengxing Coatings Co:, Ltd:, Foshan Sanshuifeng Aluminum
Industry Co:, Ltd:, Mingdi Group Co:, Ltd:, Ningbo Xintai Machinery Co:, Ltd:, Guangdong Shidun Qianjiang Powder Paint Scientific Research Co:, Ltd:, Beijing Branch
technical university:
The main drafters of this document: Hao Xuelong, Hu Shiqin, Zhu Yaohui, Xu Qiankun, Liang Meichan, Shi Hongwei, Lin Qianlong, Lu Lu, Lin Yujin, Ni Jun,
Lu Lingyun, Zhu Xinping, Wu Junsheng:
Aluminum and aluminum alloy anodized film and organic polymer film
Corrosion Rating Chart Method
1 Scope
This document describes a method for assessing corrosion results of anodic oxide coatings and organic polymer coatings on aluminum and its aluminum alloys using the chart method:
This document is applicable to the grades of corrosion results of corrosion test samples and service samples of aluminum and aluminum alloy anodized films and organic polymer films
assessment:
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document:
GB/T 6682 Analytical laboratory water specifications and test methods
GB/T 8005:3 Terminology for Aluminum and Aluminum Alloys Part 3: Surface Treatment
GB/T 26296 Defects of aluminum and aluminum alloy anodized film and organic polymer coating
GB/T 30789:2-2014 Evaluation of aging of paint and varnish coatings Number and size of defects and degree of uniform change in appearance
Identification of degrees: Part 2: Evaluation of the degree of foaming
3 Terms and Definitions
GB/T 8005:3, GB/T 26296 and the following terms and definitions apply to this document:
3:1
Corrosion corrosion
Physical-chemical reactions (usually manifested as electrochemical reactions) occur between the surface of aluminum and aluminum alloys and the environment, resulting in damage to their surface functions:
3:2
pit corrosion pitcorrosion
Pit-shaped corrosion defects on the surface of aluminum and aluminum alloy anodized films or organic polymer films that expand to the inside:
3:3
Irregularly distributed corrosion that occurs under the organic polymer film of aluminum and aluminum alloys due to the penetration of corrosive media:
Note: The corrosion generally starts from the cutting edge or local damage of the film layer:
3:4
bubbling
It appears on the surface of aluminum and aluminum alloy anodized composite film or organic polymer film, and is formed due to the local loss of bonding force under the film due to corrosion:
domed corrosion defects:
4 Test conditions
The test temperature is 20°C~25°C:
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