QC/T 484-1999 PDF English
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QC/T 484-1999: Automobile -- Paint Coating
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/QCT484-1999GUIDING TECHNICAL DOCUMENT OF THE MINISTRY OF MACHINERY INDUSTRY OF THE PEOPLE'S REPUBLIC OF CHINA QC/T 484-1999 Replacing JB/Z 111-74 Automobile -- Paint Coating Issued on. February 06, 1986 Issued by. Ministry of Machinery Industry
Table of Contents
Note on transfer of standard number... 3 1 Provisions on paint coating codes... 4 2 Technical requirements... 4 3 Marks... 12 4 Inspection... 12 Additional information... 14 Note on transfer of standard number According to the requirements of Standard Letter [1998] No. 216 of National Quality and Technology Supervision Bureau as well as the Reply No. 126 [1999] of State Bureau of Machine Building Industry, the original standard code JB/Z 111-86 is now converted to the industry standard code QC/T 484-1999.The content is temporarily unchanged. Please use the new standard code when quoting. Automobile -- Paint Coating This Standard applies to automobile paint coatings, not apply to paint coating for automobile electrical and instrument products.1 Provisions on paint coating codes
According to the different use conditions of automobile parts and paint quality requirements, the paint coating is divided into 10 groups and several levels, according to the provisions of Table 1.2 Technical requirements
2.1 The main quality indicators of paint coatings are specified in Table 2 according to the group and level of paint coating codes. 2.3 For the color of the paint coating of automobile parts, this Standard does not specify. It shall be determined by each company according to the use of parts and user requirements.3 Marks
Select the code and level of the paint coating according to the use conditions of the automobile parts and the coating quality requirements.4 Inspection
4.1 The inspection method of paint coating quality indicator is in accordance with the following provisions. 4.1.1 Paint film appearance. compare with standard version through visual inspection. 4.1.7 Adhesion. determine according to GB 1720-79 “Method of test for adhesion of paint films”. 4.1.8 Alkali resistance. use the following two inspection methods to determine. 4.1.9 Acid resistance. drop 0.1 NH2SO4 solution onto the sample plate. Observe the change of paint film after 24 hours at 20°C. 4.1.10 Water resistance. immerse the sample plate in a constant temperature water bath at 50 ± 1°C. Observe the change of paint film. Heat at 50 ± 1°C for 8 hours then stop heating. Naturally cool in a heat-insulated device for 16 hours as a cycle. 4.1.12 Gasoline resistance. determine according to GB 1734-79 “Determination of resistance to petrol of films”. 4.1.13 Engine oil resistance. determine according to chemical temporary 2017-57 “Determination of resistance to lubricating oil”. 4.1.14 Weather resistance. assess the ability of paint film to resist natural damage. 4.1.15 Temperature change resistance. put the test sample plate from room temperature into a +60°C oven for 1 hour. Then take out the sample plate. Cool to room temperature then put into a -40°C freezer for one hour. Take out the sample plate to cool to room temperature and it shall be one cycle. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
