Cl离子对304、316不锈钢临界点蚀温度的影响  

INFLUENCE OF Cl^- ON CRITICAL PITTING TEMPERATURE FOR 304 AND 316 STAINLESS STEELS

作　　者：吴玮巍[1] 蒋益明[1] 廖家兴[1] 钟澄[1] 李劲[1] 

机构地区：[1]复旦大学材料科学系,上海200433

出　　处：《腐蚀科学与防护技术》2007年第1期16-19,共4页Corrosion Science and Protection Technology

基　　金：国家自然科学基金(10374015);"973"项目(2002CB613504);上海市纳米专项(0452nm004)

摘　　要：采用外加恒定电位下腐蚀电流-温度扫描的方法分别研究了304、316不锈钢在不同浓度NaC l水溶液中的临界点蚀温度.得到了材料临界点蚀温度随C l-浓度变化的关系曲线.在分析温度与C l-浓度分别对钝化膜影响的基础上阐述了二者对不锈钢点蚀的综合作用机理.Tbe pitting corrosion of 304 and 316 stainless steels has been studied by monitoring the evolution process of corrosion current with temperature in NaCl solutions with different concentration under constant applied potentials. And the critical pitting temperature （CPT） was measured. The evolution of CPT versus NaCl concentration for 304 and 316 stainless steels was obtained. The influence of Cl- concentration on critical pitting temperature of 304 and 316 stainless steels has been discussed in terms of the interaction between passive film and Cl ions.

关 键 词：不锈钢 点蚀 临界点蚀温度 

分 类 号：TG172.9[金属学及工艺—金属表面处理]