Corrosion of galvanised steel under an electrolytic drop
Corrosion of galvanised steel under an electrolytic drop
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DOI：
10.1016/j.corsci.2006.05.027
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发表时间：
2007-02
影响因子：
8.3
通讯作者：
E. Dubuisson;Philippe Lavie;F. Dalard;J. Caire;S. Szunerits
中科院分区：
文献类型：
--
作者：
E. Dubuisson;Philippe Lavie;F. Dalard;J. Caire;S. Szunerits
本文首次描述了用含有氯化物和硫酸盐离子的电解液滴对镀锌钢的局部腐蚀行为的研究。电解层最大高度为500 ~ 1100μm，电解层直径为1.47 ~ 3.35mm。这些测量可以通过使用微电极作为参考电极和反电极来实现，它们可以插入电解质液滴中，从而形成电化学微电池。记录了电解质液滴构型下的极化曲线和电化学阻抗谱图，从而确定了Stern和Geary方程的极化电阻rpp和比例常数k。研究了温度、氯化物浓度、pH和电解层厚度对镀锌钢腐蚀速率的影响。
Described here for the first time is an investigation of the local corrosion behaviour of galvanized steel using an electrolytic droplet comprising chloride and sulphate ions. The maximal height of the electrolytic layer and the diameter varied between 500–1100μm with a total diameter between 1.47–3.35mm, respectively. These measurements were possible by using microelectrodes as reference and counter electrodes, which could be inserted into the electrolyte droplet thus forming an electrochemical microcell. Polarization curves as well as electrochemical impedance spectroscopy plots were recorded under the electrolyte droplet configuration allowing the determination of the polarisation resistance Rpand the proportionality constant k of the Stern and Geary equation. The influence of temperature, chloride concentration, pH and the thickness of the electrolytic layer on the corrosion rate of galvanised steel were studied.