0Cr25Ni7Mo4、316与304不锈钢临界点蚀温度研究  

ELECTROCHEMCIAL MEASUREMENT OF CRITICAL PITTING TEMPERATURE OF 0Cr25Ni7Mo4,316 AND 304 STAINLESS STEELS IN 3.5% NaCl SOLUTION

作　　者：吴玮巍[1] 蒋益明[1] 廖家兴[1] 钟澄[1] 郭峰[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》2006年第4期285-288,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-温度扫描方法研究了0Cr25Ni7Mo4、304和316不锈钢在1 mol/L NaCl水溶液中的点蚀行为。利用不锈钢临界点蚀温度评价了材料的耐点蚀性能.测得0Cr25Ni7Mo4和316不锈钢的临界点蚀温度分别为79.5℃和15℃,304不锈钢在0℃以下.对0Cr25Ni7Mo4不锈钢材料优良耐点蚀性能的原因进行了分析讨论.The pitting corrosion of 0Cr25Ni7Mo4, 304 and 316 stainless steels has been studied by measuring evolution of corrosion current with temperature in 1 mol/L NaCl solutions under constant potentials. The pitting corrosion resistance of the stainless steels was ranked by their critical pitting temperatures, which for 0Cr25Ni7Mo4 and 316 stainless steels are 79,5 12 and 15 12 respectively, but for 304 stainless steels are subfreezing. The experimental results were discussed on the basis of the composition of the steels.

关 键 词：不锈钢 临界点蚀温度 点蚀 

分 类 号：TG172.9[金属学及工艺—金属表面处理]