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Crevice Corrosion Performance of 436 Ferritic Stainless Steel Studied by Different Electrochemical Techniques in Sodium Chloride Solutions with Sulfate Addition
Acta Metallurgica Sinica-English Letters ( IF 3.5 ) Pub Date : 2018-04-09 , DOI: 10.1007/s40195-018-0720-x
Jia-Ming Wang , Sheng-Sheng Qian , Yuan-Yuan Liu , Yang-Ting Sun , Yi-Ming Jiang , Jin Li

The crevice corrosion behaviors of 436 stainless steels in chloride-containing solutions with sulfate addition were studied using potentiodynamic, galvanostatic and repassivation potential measurements. The results of these electrochemical tests were compared and discussed. Galvanostatic test was proved to be the most powerful technique in detecting the crevice corrosion of 436 stainless steels, while the repassivation potential measurement was the most time-saving method in this study. Sulfate ions have inhibited the crevice corrosion of 436 stainless steels in chloride-containing solution, which may result from the effects of competitive adsorption and the IR drop mechanism.

中文翻译:

不同电化学技术研究的436铁素体不锈钢在氯化钠加硫酸盐溶液中的缝隙腐蚀性能

使用恒电位,恒电流和再钝化电位测量研究了436不锈钢在含氯溶液中添加硫酸盐后的缝隙腐蚀行为。比较和讨论了这些电化学测试的结果。静电流试验被证明是检测436不锈钢缝隙腐蚀的最有效技术,而钝化电位测量是这项研究中最省时的方法。硫酸根离子抑制了436不锈钢在含氯溶液中的缝隙腐蚀,这可能是由于竞争性吸附和IR下降机理的影响。
更新日期:2018-04-09
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