Abstract

The electrodeposition of zinc–iron–cobalt alloys from sulfate bath was carried out galvanostatically on steel. A complementary approach based on of a combination of different electrochemical techniques was used to clarify the deposition mechanism. The electrodeposition of the alloys was of an anomalous type. The corrosion behavior of the coatings was evaluated from polarization measurements in hydrochloric acid. The deposition at different current densities exhibited varied influence on the corrosion potential of alloys obtained from sulfate baths. It was shown that increased corrosion protection of steel can be achieved by electrochemical deposition of ternary alloys with higher amounts of the Co and Fe. The composition of the ternary alloy can be optimized by proper choice of the current density.

中文翻译：

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电流密度对Zn-Fe-Co合金电沉积和溶解机理的影响

摘要

硫酸盐浴中的锌-铁-钴合金的电沉积是在钢上进行恒流的。基于不同电化学技术的组合的补充方法用于阐明沉积机理。合金的电沉积是异常类型的。通过在盐酸中的极化测量来评估涂层的腐蚀行为。在不同电流密度下的沉积对从硫酸盐浴获得的合金的腐蚀潜能表现出不同的影响。结果表明，通过电化学沉积具有较高Co和Fe含量的三元合金，可以提高钢的防腐性能。三元合金的组合物可以通过的电流密度的正确选择进行优化。