black pickling

• 粗酸洗,初酸洗

black pickling的用法和样例：

例句

1. A high efficient and low cost inhibitor for HCl acid pickling of steel has been prepared by using unsaturated rough alcohol and organic amine.
   利用粗品不饱和醇和有机胺的协同作用，制得缓蚀效率高而成本低的盐酸酸洗缓蚀抑雾剂。