冷拔钢管磷化液中Fe^（2＋）的抑制

DEPRESSION OF Fe￣(2+) IN PHOSPHORIZATION SOLUTION FOR COLD-DRAWN STEEL PIPE

分析了冷拔钢管磷化液中Ｆｅ^（２＋）的危害及其产生原因，介绍了抑制Ｆｅ^（２＋）的机理。进行了ＮａＣｌＯ_３抑制磷化液中Ｆｅ^（２＋）的试验，结果表明，按０．５ｇ／Ｌ添加ＮａＣｌＯ_３，可获得较好的抑制效果和经济效益。同时介绍了操作要点。

The hazards from Fe￣(2+) in the phosphorization solution for cold-drawn steel tubes and elements responsible therefor are investigated,and mechanism concerning depression of the said Fe￣(2+)described.Experiments upon depression of Fe￣(2+) in the phosphorization solution with NaClO_3 were carried out, which led to the conclusion that adding NaClO_3 into the solution at the concentration by weight of 0.5g/L could produce effective depression, hence increased economy.Also introduced are the key points of the operation.