阴离子和铬酸浓度对锌在铬酸溶液中钝化的影响  

THE EFFECT OF ANION AND CONCENTRATION OF CHROMIUM ACID ON THE CHROMATE CONVERSION OF ZINC

作　　者：陈义勤[1] 谢文磊[1] 刘洛娜 吴金椿 

机构地区：[1]郑州粮食学院,郑州工学院

出　　处：《河南科学》1995年第3期218-222,共5页Henan Science

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.

关 键 词：阴离子 铬酸 锌 钝化 表面处理 

分 类 号：TG178[金属学及工艺—金属表面处理]