日日摸夜夜欧美一区二区-日日摸夜夜摸无需播放器-日日摸夜夜摸狠狠摸日日碰夜夜做-日日摸夜夜摸狠狠摸97-日日摸夜夜-日日摸日日添夜夜爽97

Product name:(Coloured Zinc) 1. Hardware

Surface treatment: trivalent chromium coloured zinc
Thickness of film: over 8 M
NSS: 72 hours without white rust, 240 hours without white rust

Overview of electroplating:
Electroplating refers to a surface processing method in which the cations to be plated in the bath are deposited on the surface of the base metal in the salt solution containing the metal to be plated by electrolysis with the base metal as the cathode. The performance of the coating is different from that of the base metal and has new characteristics. According to the function of the coating, it can be divided into protective coating, decorative coating and other functional coating.


Overview of electroplating:


Electroplating refers to a surface processing method in which the cations to be plated in the bath are deposited on the surface of the base metal in the salt solution containing the metal to be plated by electrolysis with the base metal as the cathode. The performance of the coating is different from that of the base metal and has new characteristics. According to the function of the coating, it can be divided into protective coating, decorative coating and other functional coating.

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