Effect of SO42- Concentration on Corrosion Behaviors of Alloy 690 under ETA Water Chemistry Condition
摘 要
在PWR二回路乙醇胺(ETA)水工况下, 通过高温高压模拟试验和低温电化学试验研究了SO42-对690合金腐蚀行为的影响。结果表明, 在乙醇胺(ETA)水工况下,SO42-主要引发690合金的全面腐蚀和晶间腐蚀; 对基体元素中铬和铁的溶出有促进作用, 对镍的溶出有抑制作用; 铁的溶出量随着SO42-浓度的增大而增加, 铬和镍的溶出量受SO42-浓度的影响较小。
Abstract
The corrosion behaviors of Alloy 690 in environments of ethanolamine (ETA) water chemistry condition were investigated by means of high temperature and high pressure simulated tests and low-temperature electrochemical tests, the effect of SO42- concentration was detailedly studied. The results showed that under the ETA water chemistry condition, SO42- mainly caused general corrosion and intergranular corrosion of alloy 690, the dissolution of the matrix elements Cr and Fe was promoted while the dissolution of Ni was inhibited. The dissolution of Fe increased with the increase of the concentration of SO42- while the dissolution of Ni and Cr was almost not affected.
中图分类号 TG174
所属栏目 试验研究
基金项目 电力与交通材料保护湖南省重点实验室开放基金资助项目(2010CL02)
收稿日期 2012/7/12
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联系人作者李宇春(iamlyc@263.net)
备注李宇春, 教授, 博士,
引用该论文: ZHANG Rui-feng,LI Yu-chun,PANG Fei-fei,LIU Xiao-wei. Effect of SO42- Concentration on Corrosion Behaviors of Alloy 690 under ETA Water Chemistry Condition[J]. Corrosion & Protection, 2013, 34(5): 413
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参考文献
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