Effect of hydrogen carbonate and chloride on zinc corrosion investigated by a scanning flow cell system
Effect of hydrogen carbonate and chloride on zinc corrosion investigated by a scanning flow cell system
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DOI：
10.1016/j.electacta.2015.01.217
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发表时间：
2015-03-20
影响因子：
6.6
通讯作者：
Mayrhofer, Karl J. J.
中科院分区：
文献类型：
--
作者：
Laska, Claudius A.;Auinger, Michael;Mayrhofer, Karl J. J.
本文采用带有时间分辨下游检测系统的扫描流动池，分析了锌在弱碱性含碳酸氢盐电解液中的腐蚀行为。由于锌通常暴露于不同的环境条件下，动态电解质交换是用来调查随着时间的推移，电解质成分的变化的影响。用恒电流脉冲监测极化电阻。应用阳极电流阶跃以将总净电流与沉淀物形成速率相关联。利用宽离子束截面技术的腐蚀表面和沉淀物的形态特征的调查结果进行了补充。(C)2015爱思唯尔有限公司版权所有。
A scanning flow cell with time-resolved downstream detection system is employed to analyse the corrosion behaviour of zinc in weakly alkaline hydrogen carbonate-containing electrolytes. Since zinc is usually exposed to varying environmental conditions, dynamic electrolyte exchange is used to investigate the impact of changing electrolyte constituents over time for the first time. The polarization resistance was monitored with galvanostatic pulses. Anodic current steps are applied to correlate the overall net current to the rate of precipitate formation. The results are complemented by investigations of the morphological features of the corroded surfaces and precipitates utilizing broad ion beam cross-sectioning techniques. (C) 2015 Elsevier Ltd. All rights reserved.