Effect of potassium cyanide on kinetics of zinc electroplating from tetrahydroxozincate solutions

被引：3
|
作者：
Rezaite, V [1 ]
Vishomirskis, R [1 ]
机构：
[1] Inst Chem, LT-2600 Vilnius, Lithuania
来源：
PROTECTION OF METALS | 2001年 / 37卷 / 04期
关键词：
Zinc; Potassium; Inorganic Chemistry; Cyanide; Transfer Coefficient;
D O I：
10.1023/A:1010478922857
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
By the method of chronopotentiometry, it is shown that, being added to tetrahydroxozincate baths, potassium cyanide affects the kinetic parameters of zinc electroplating, by increasing the slope of Tafel plot, decreasing the cathodic transfer coefficient, and reducing the exchange current. The effect strengthens with a decrease in zinc concentration in the bath; the limiting current of zinc deposition loses its diffusion nature. The results reveal the decisive effect of CN- ions on the composition and properties of interface layers formed at a zinc cathode during the electrolysis.
引用
收藏
页码：310 / 313
页数：4
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