www.qubook._国产精品一区二555_欧美在线免费_日韩在线电影_国产高清一区_久久久久成人精品

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.

主站蜘蛛池模板: 超碰精品在线观看 | 欧美精品三区 | 亚洲人成网站观看在线观看 | 中国一级一级全黄 | 久久美女视频 | 亚洲综合在线一区 | 欧洲在线一区 | 99国产视频 | 国产区视频 | 欧美精品在线免费 | 欧美二区在线 | 浮力影院5826最新地址 | 性感毛片| 国产精品久久久久三级 | 日韩第一视频 | 91色视频在线观看 | 久久这里只有精品6 | 在线免费一区二区 | 欧美人人 | 男人添女人下面真爽视频免 | 精新精新国产自在现拍 | 嫩草影院入口 | 日韩中文字幕精品视频在线 | 涩五月婷婷 | 久久视频在线视频观看99 | 国产亚洲一区二区三区在线观看 | 日韩毛片免费 | 欧美成人一区二区视频 | 国产一区二区三区四区在线观看 | 免费观看一级成人毛片 | 亚洲第一视频 | av免费在线观看免费 | 欧美18videosex| 成人精品视频在线观看 | 欧美成人tv | 欧美精品一区二区三区在线播放 | 天天透天天操 | 欧美日韩黄色 | 久久久久久草 | 精品一区二区三区蜜桃 | 亚洲永久免费 |