rbjk
:首先确定钢板的等级,再去判断动力工具除锈等级
ST3级手工和动力工具除锈 钢材表面应无可见的油脂和污垢,并且没有附着不牢的氧化皮、铁锈和油漆涂层等附着物。除锈应比St2更为彻底,底材显露部分的表面应具有金属光泽。
(2012-02-15 10:57)
你说的是St2标准
St2的的定义是:When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and from poorly adhering mill scale, rust, paint coatings and foreign matter.
St3的的定义是:As for St 2, but the surface shall be treated much more thoroughly to give a metallic sheen arising from the metallic substrate.