材料期刊网

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。

The effect of addition of 7. 02%-11. 98% nickel on crevice corrosion be- haviour of Type 304 stainless steel has been investigated with immersion test and electro- chemical measurement techniques in 0. 3%NaCl solution. The results showed that the addi- tion of nickel increased the repassivation potential for crevice corrosion (ER), decreased the product of number of sites attacked, N and average value of maximum depth, D(NXD) 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 im- proved electrochemical behavior and the stability of film.