摘要
一般认为交流电对金属的腐蚀过程具有加速作用,但我们发现,在直流电位基础上叠加适当波形、幅值和频率的交流电对不锈钢进行载波钝化,尔后再进行适当后处理可使钝化膜的稳定性提高,我们曾就不经后处理的载波钝化过程进行过探讨,本文着重探讨钼酸盐后处理对载波钝化膜表面状态和化学稳定性改善的作用机理。
By means of electrochemical method, ellipsometry and AES analysis, the stability of the passive film formed after A.V. modulating passivation and post-treatment was studied. The results show that the defect points can be removed and the surface of the passive film is roughened through A. V. modulating passivation. The adsorption of Mo-Containing ion on the surface of the passive film during post-treatment becomes easier,which further increases the stability of the passive film. A more striking improvement of the stability of the passive film was observed on 302 stainless steel than cn 316 stainless steel.
出处
《应用化学》
CAS
CSCD
北大核心
1992年第1期79-81,共3页
Chinese Journal of Applied Chemistry
关键词
不锈钢
钝化
载波钝化
钼酸盐
stainless, steel, passivation, post-treatment, A.V. modulation
