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GB/T 42544-2023: Corrosion evaluation for anodic oxide coatings and organic polymer coatings on aluminium and its alloys - Grid method
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| GB/T 42544-2023 | English | 139 |
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Corrosion evaluation for anodic oxide coatings and organic polymer coatings on aluminium and its alloys - Grid method
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GB/T 42544-2023
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Basic data | Standard ID | GB/T 42544-2023 (GB/T42544-2023) | | Description (Translated English) | Corrosion evaluation for anodic oxide coatings and organic polymer coatings on aluminium and its alloys - Grid method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H21 | | Classification of International Standard | 25.220.20 | | Word Count Estimation | 6,691 | | 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 42544-2023: Corrosion evaluation for anodic oxide coatings and organic polymer coatings on aluminium and its alloys - Grid method
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ICS 25:220:20
CCSH21
National Standards of People's Republic of China
Aluminum and aluminum alloy anodized film and organic polymer film
Corrosion Assessment Grid 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 8994:2018 "Grid Method for Evaluation and Grading System of Anodic Oxidation Pitting Corrosion of Aluminum and Aluminum Alloys":
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:, Nonferrous Metal Technology Research Institute Co:, Ltd:, Guangdong Haomeixin
Material Co:, Ltd:, Guangdong Xingfa Aluminum Co:, Ltd:, Fujian Nanping Aluminum Co:, Ltd:, Guangdong Academy of Sciences Industrial Analysis and Testing
Center, Dongliang Aluminum Co:, Ltd:, Liaoning Zhongwang Group Co:, Ltd:, Jiangyin Hengxing Paint Co:, Ltd:, Mingdi Group Co:, Ltd:
The main drafters of this document: Hao Xuelong, Gu Liu, Luo Chunhua, Zhang Donghui, Liang Jinpeng, Jian Sicong, Liu Quanquan, Fan Zhigang, Zhang Yijie,
Li Honglin, Lin Qianlong, Wang Lin:
Aluminum and aluminum alloy anodized film and organic polymer film
Corrosion Assessment Grid Method
1 Scope
This document describes a method for evaluating corrosion results of anodic oxide coatings and organic polymer coatings on aluminum and its aluminum alloys using the grid method:
This document is applicable to the grades of corrosion results of aluminum and aluminum alloy anodized film and organic polymer film corrosion test samples and service samples
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 42514-2023 Corrosion assessment chart method for aluminum and aluminum alloy anodized film and organic polymer film
3 Terms and Definitions
The following terms and definitions defined in GB/T 42514-2023 apply to this document:
3:1
defective grid defectivesquare
Cover the effective surface of the corrosion sample with a transparent plate with a grid spacing of 5 mm, covering one or more corrosion defects (minimum diameter of
0:1mm) grid:
4 Determination of corrosion grade evaluation elements
According to the corrosion type of the sample and the source of the sample, determine the corrosion grade evaluation elements according to Table 1:
Table 1 Corrosion type, sample source and corrosion grade evaluation elements
corrosion type
Sample sourcea
Corrosion test sample
Corrosion performance test of anodized film
Corrosion performance test of organic polymer film
Anodized composite film powder spray film spray paint film
service sample
Corrosion grade
Assessment elements
pitting corrosion
Salt spray corrosion resistance (such as CASS, NASS,
AASS, etc:), chemical resistance (salt water resistance
resistance, acid resistance, etc:), resistance to sulfur dioxide moisture
Corrosive atmosphere, etc:
Salt spray corrosion resistance (such as
CASS, NASS, AASS
etc:), resistance to sulfur dioxide tide
Humid atmosphere corrosive etc:
Salt spray corrosion resistance (such as
CASS, NASS, AASS
etc:), resistance to sulfur dioxide tide
Humid atmosphere corrosion, alkali resistance
Resistance, resistance to nitric acid, etc:
in the natural ring
in use
produce corrosion
on the product
intercepted sample
corrosion point
size, distribution
and area
a The corrosion sample area should not be less than 5000mm2, preferably 100mm×50mm: Corrosion test samples should be taken from within 24 hours after the end of the corrosion test
sample:
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