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Introduction to the Development of Chinese Coatings Testing Standards
2024-02-27 10:01
The standardization work of China's coatings industry has been established since 1954 with reference to the standards of the former Soviet Union. In 1979, the China Coatings and Pigments Standardization Technical Committee (CSBTS/TC5) was established, which accelerated the process of adopting international standards and advanced foreign standards, mainly ISO standards and ASTM standards. A considerable number of method standards and product standards were formulated.
This article mainly introduces the current coatings testing method standards and mandatory standards in China.
Standard for coatings testing methods
At present, the Chinese coatings testing method standards are mainly divided into five categories based on the testing items.
Number |
Performance classification |
Secondary Performance classification |
Parameters |
1 |
Basic physical properties |
Liquidity |
Sampling, appearance, color, density, solid content, fineness, acidity, viscosity, storage stability, flash point, etc |
Painting |
Flow resistance, covering power, dryness, thickness, polishing ability, etc |
||
2 |
Routine physical property testing of coating |
Appearance and optical performance |
Color, gloss, radiopacity, etc
|
Mechanical properties |
Adhesion, flexibility, impact, cupping, hardness, wear resistance, washability, etc
|
||
Chemical resistance and corrosion resistance |
Water resistance, chemical reagent resistance, stain resistance, heat resistance, temperature change, etc
|
||
3 |
Coating environmental test |
Aging, salt spray, humid heat, yellowing, condensation, etc
|
|
4 |
Detection of toxic and harmful substances and prohibited substances |
Benzene, methanol, halogenated hydrocarbons, depleting ozone substances, ethylene glycol methyl ether and derivatives of ethylene glycol methyl ether, phthalic acid vinegar, azo pigments, APEO (alkyl phenyl polyethylene ether), banned, polychlorinated biphenyls, formaldehyde, VOC, free diisocyanate vinegar, heavy metals, polycyclic aromatic hydrocarbons, trisubstituted organotin compounds, asbestos, radioactive materials, biological killing agents, etc
|
|
5 |
Special project testing for specialized coatings |
Particle size, breakdown strength, electrical strength, etc
|
Compulsory standards
At present, China has successively formulated 7 mandatory standards for coatings, with specific information as follows.
Number |
Standard Number |
Standard Name |
|
1 |
GB 18581-2020 |
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Limit of harmful substances of wooden coatings |
2 |
GB 18582-2020 |
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Limit of harmful substances of architectural wall coatings |
3 |
GB 24613-2009 |
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Limit of harmful substances of coatings for toys |
4 |
GB 24409-2020 |
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Limit of harmful substances of vehicle coatings |
5 |
GB 30981--2020 |
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Limit of harmful substances of industrial protective coatings |
6 |
GB 38648-2019 |
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Limit of harmful substances of interior floor coatings |
7 |
GB 38469-2019 |
´¬²°Í¿ÁÏÖÐÓк¦ÎïÖÊÏÞÁ¿ |
Limit of harmful substances of marine coatings |
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