应用方波电位脉冲方法检测304L奥氏体不锈钢晶间腐蚀敏感性  

Determing the Susceptibility of 304L Austenitic Stainless Steel to Intergranular Corrosion by Square-wave Potentiostatic Pulse Technique

作　　者：李久青[1] 孙冬柏[1] 吴荫顺[1] 方智[1] 崔在明 江光[1] 

机构地区：[1]北京科技大学表面科学与腐蚀工程系,北京核安全中心

出　　处：《北京科技大学学报》1994年第A01期52-58,共7页Journal of University of Science and Technology Beijing

摘　　要：用方波电位脉冲法，对ＡＩＳＩ３０４Ｌ不锈钢主要由晶界贫铬引起的晶间腐蚀敏感性随敏化时间的变化规律进行了研究。通过比较发现方波电位脉冲实验与ＥＰＲ方法、１０％草酸电解实验以及Ｈ２ＳＯ４－ＣｕＳＯ（４－）钢屑实验之间存在着较好的对应关系。方波电位脉冲法可以精确地定量反映３０４Ｌ不锈钢的晶间腐蚀敏感性，对应第１０个脉冲的再活化电流密度峰值ｉ（ｒ１０）可作为反映晶间腐蚀敏感性的特征参数。The susceptibility of AISI 304L austenitic stainless steel to intergranular attack mainly caused by the Cr-depletion in grain boundaries was detected by the square-wave potentiostatic pulse technique. The degree of the sensitization of 304L stainless steel can be exactly and quantitively illustrated by this technique.The maximum reactivation current density corresponding to 10th pulse,ir10,was selected as a characteristic parameter for the detection of sensitization.The degree of the sensitization determined by square-wave potentiostatic pulse technique was in agreement with those obtained from DL-EPR and ASTM standard tests.

关 键 词：奥氏体 不锈钢 晶间腐蚀 敏感度 

分 类 号：TG142.71[一般工业技术—材料科学与工程]