Pitting corrosion of sensitised type 304 stainless steel under wet-dry cycling condition
Pitting corrosion of sensitised type 304 stainless steel under wet-dry cycling condition
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敏化304不锈钢干湿循环条件下的点蚀
DOI：
10.1016/j.corsci.2017.02.010
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发表时间：
2017-04-01
影响因子：
8.3
通讯作者：
Nishikata, Atsushi
中科院分区：
文献类型：
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作者：
Cheng, Cong-Qian;Klinkenberg, Laura-Isabell;Nishikata, Atsushi
研究了敏化304不锈钢在干湿循环过程中的点蚀行为，并与AR不锈钢进行了比较。在干燥过程中的点蚀和再钝化在润湿过程中的平均相对湿度相应地增加从56%到65%和从67%到79%的敏化。点蚀电位和临界氯化物浓度的降低提供了敏化SS 304的降解证据。敏化提高了点蚀概率和点蚀平均尺寸。纹孔形态由圆形变为不规则形。这种改性可能是由沿沿着晶界的优先腐蚀引起的。(C)2017爱思唯尔有限公司版权所有
The pitting corrosion of sensitised stainless steel (SS) 304 during wet-dry cycling were investigated and compared with that of AR one. The average relative humidity for pitting corrosion during drying and repassivation during wetting correspondingly increased from 56% to 65% and from 67% to 79% by sensitisation. The decrease in pit potential and critical chloride concentration provides the degradation evidence of sensitised SS 304. The pitting probability and pit average size were promoted by sensitisation. The pit morphology changed from round to irregular shape. Such modification was possibly induced by preferential corrosion along grain boundaries where the pit initiated. (C) 2017 Elsevier Ltd. All rights reserved.