日韩人妻无码一区二区三区久久99_日韩精品一区二区三区中文在线_无码日韩精品一区二区免费_久久久91精品国产一区二区三区_亚洲精品久久久一区黄无码_精品欧美一区二区在线观看欧美熟_精品一区二区高清免费观看_国产免费一区2区3区_国产日韩精品福利视频综合一区二区三区四区

Guangzhou Steel tells you: steel blasting and painting method request

Guangzhou Steel tells you: steel blasting and painting method request

Steel rust coating method and requests?
[Guangzhou Steel answer] 1, rust grades should be based on the original state of the steel surface, the choice of primer, rust method used and other factors to determine the project cost.
2, when the use of hand-rust, rust quality level should not be less than the current national standard after treatment to the primed surface interval should not exceed 6h, during which surface should insist on a clean, non-wet, oil and the like. Guangzhou Steel