摘要
采用循环伏安法和交流阻抗法测定了锌电极在铬酸溶液及添加硫酸和硝酸的铬酸溶液中的钝化过程，结果表明，锌的铬酸钝化是阴极和阳极的混合钝化过程。硫酸和硝酸能促进铬酸还原，硝酸能阻化阳极溶解，均利于钝化膜的形成和生长。
The chromate conversion of zinc was determined, with different concentration of chro-mium acid and different anions such as SO and NO added，by using Scanning Volt-AmpereMethod and AC Impedance Method．It was shown that the chromate conversion of zinc isthe mixed process taking place on cathode and anode．Sulphuric acid and nitric acid can en-hance the reduction of chromium acid while nitric acid can retard the dissolving of anode，both of which are favourable to the formation and grouth of the chromate conversion filmson zinc.
出处
《河南科学》
1995年第3期218-222,共5页
Henan Science
关键词
阴离子
铬酸
锌
钝化
表面处理
Anion
Chromium acid
Chromate conversion
Zinc
