摘要
通过5.6mol/LH_2SO_4中活性溶解能力和含氯离子介质中点蚀破裂电位E_b的测量,证明304不锈钢过钝化膜的耐酸活化溶解能力远远优于钝化膜。钼酸盐溶液的后处理,可使304不锈钢过钝化膜的点蚀破裂电位升高。304不锈钢这些稳定性的提高,与钝化膜中各组成结构的变化紧密相关。运用AES和XPS表面分析手段研究了304不锈钢表面膜的组成结构与外加极化电位,膜稳定性的关系。
The measurements of the activation time and the breakdown potential of surface films formed on stainless steel 304 in passive or transpassive potential range, followed by post-treatment in Na_2MoO_4 containing solution or not treated, were carried out. The results show that the resistance of transpassive film against the activation dissolution in acidic solution is much higher than that of passive film, and the breakdown potential of transpassive film can be strikingly enhanced by post-treatment. In addition, the effects of potential and post-treatment on the composition of surface film were investigated by means of AES and XPS analysis, and the relationship between the composition and stability of film was discussed too.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第8期B367-B374,共8页
Acta Metallurgica Sinica
基金
国家自然科学基金
关键词
不锈钢
钝化
稳定性
stainless steel 304, passivation, transpassivation, stability
