Pulsed electrodeposition of microcrystalline chromium from trivalent Cr-DMF bath

被引：0
作者：
G. Saravanan
S. Mohan
机构：
[1] Central Electrochemical Research Institute,
来源：
Journal of Applied Electrochemistry | 2009年 / 39卷
关键词：
Trivalent chromium; Chromium electrodeposition; Duty cycle; Coatings; Electrochemical impedance spectroscopy (EIS); Porosity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Pulsed electrodeposition (PED) with square wave has successfully been applied to deposit microcrystalline chromium from Cr-dimethylformamide (DMF) bath. The influence of the duty cycle, on-time, off-time, frequency, and pulse peak current on thickness, current efficiency, and hardness were investigated. Based on the analysis of the microstructure, the corrosion behavior of both direct-current deposited (DCD) and pulse-current deposited (PED) chromium in 3.5% NaCl solution was studied using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results indicated that both pulsed electrodeposits and direct-current deposits have high charge transfer resistance Rct and very low Icorr compared with mild-steel substrate.
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页码：1393 / 1397
页数：4
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