摘要
采用化学浸泡实验和电化学测试技术，探讨了Ｎｉ元素对３０４不锈钢在０．３％ＮａＣｌ溶液中缝隙腐蚀行为的影响．结果表明，合金元素Ｎｉ的加入，可提高ＥＲ，抑制不锈钢的活性溶解行为和有效提高抗缝隙腐蚀能力．通过ＡＥＳ和ＸＰＳ分析表面膜发现，Ｎｉ元素在不锈钢表层和基体过渡区富集，并以ＮｉＯ的形式参与成膜过程．Ｃｒ和Ｎｉ的协同效应，改变了不锈钢表面电化学行为，提高了膜的稳定性．
The effect of addition of 7.02%11.98% nickel on crevice corrosion behaviour of Type 304 stainless steel has been investigated with immersion test and electrochemical measurement techniques in 0.3%NaCl solution. The results showed that the addition of nickel increased the repassivation potential for crevice corrosion ( E R), decreased the product of number of sites attacked, N and average value of maximum depth, BX]D(ND) and prevented the active dissolution, improving the resistance to crevice corrosion for Type 304 stainless steel. The AES and XPS analysis indicated that nickel was rich in surface film and transition zone, also existed as NiO in film. The joint effect of chromium and nickel improved electrochemical behavior and the stability of film.\=
出处
《腐蚀科学与防护技术》
CAS
CSCD
1999年第3期147-151,共5页
Corrosion Science and Protection Technology
基金
国家教委基金
金属腐蚀与防护国家重点实验室资助项目
关键词
镍
奥氏体不锈钢
缝隙腐蚀
氯化钠溶液
Nickel, austenitic stainless steel, NaCl solution, crevice corrosion \=
