镀锌层磷化工艺的研究

为在镀锌层表面获得抗蚀性强、与涂层附着好的磷化膜，在镀锌层表面处理液中加入Fe^2＋和Ni^2＋，并加入磷酸（85％）、硝酸钠、氧化锌、氟化钠等，通过正交试验优化出了一种可获得高附着力的镀锌层磷化成膜工艺，其工艺条件为：1．4g/L Zn^2＋，0．6g/L Mn^2＋，25g/L PO4^3-，20g/L NO3^-，1g/L F^-，成膜时间10min，温度35—45℃。实验结果表明：采用该新的镀锌层磷化工艺可在镀锌层表面形成均匀、致密、抗腐蚀性强的磷化膜，可用于取代传统的镀锌层磷化膜。

Phosphating Process Study on Zinc Deposit

In order to obtain the phosphating film with strong anti-corrosion and good adhesion, iron and nickel ions,and add phosphorus acid (85%), sodium nitrate, zinc oxide, sodium fluoride, and so on were added into surface treatment solution of of zinc deposit.And a high zinc phosphide layer film technology was optimized by orthogonal test. Its process was 35～45 ℃, Zn~(2+) 1.4g/L, Mn~(2+) 0.6g/L, PO_4~(3-) 25g/L, NO_3~- 20g/L, F~- 1g/L,10 min film formingtime. The results show that the uniform, dense and strong anti-corrosive phosphating film can be obtained on the surface of zinc deposit by the new phosphating process in 35～45 ℃ in 10 min.It can be used to replace the traditional zinc-phosphate film.