Electrodeposition of Zn-Co alloy coatings from sulfate-chloride electrolytes

被引：30
|
作者：
Kirilova, I
Ivanov, I
Rashkov, S
机构：
[1] Institute of Physical Chemistry, Bulgarian Academy of Sciences
来源：
JOURNAL OF APPLIED ELECTROCHEMISTRY | 1997年 / 27卷 / 12期
关键词：
corrosion resistance; electrodeposition; sulfate-chloride electrolyte; Zn-Co alloy;
D O I：
10.1023/A:1018425129532
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The composition, surface morphology and appearance of Zn-Co alloy deposits as a function of current density, electrode potential and Co2+ concentration in the electrolyte was studied. It was found that coatings of good quality with low (1%) Co content are formed at a current density of 0.2 A dm(-2) and with high (6.5%) Co content at 2 A dm(-2) from electrolytes containing 1.0 M Co2+ under galvanostatic conditions. The potentiodynamic dissolution of coatings with Co content of 6.5% indicates successive deposition of Co enriched phases and a pure Zn phase. The Zn-Co alloys are more corrosion resistant than zinc but are less resistant than cobalt.
引用
收藏
页码：1380 / 1384
页数：5
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