几种离子注入模式抑制电机护环钢SCC性能比较  

COMPARISON OF THREE MODES OF ION IMPLANTATION TO RESTRAIN SCC BEHAVIOR OF GENERATOR RETAINING RING STEEL

作　　者：吴翠兰[1] 靳浩[1] 靳九成[1] 

机构地区：[1]湖南大学

出　　处：《腐蚀科学与防护技术》1997年第1期38-43,共6页Corrosion Science and Protection Technology

基　　金：金属腐蚀与防护国家重点实验室.北京中关村地区联合分析测试中心和科贝尔基金资助

摘　　要：对比研究了Ｅｒ＋＋Ｃｒ＋注入模式、Ａｓ＋注入模式和Ｅｒ＋＋Ａｓ＋注入模式对提高５０Ｍｎ１８Ｃｒ４电机护环钢ＳＣＣＲ性能的优缺点和机制．结果表明Ａｓ＋注入模式具有最高的单位剂量提高ＳＣＣＲ效益，但是ｔｆ的潜力有限（＜３倍）；Ｅｒ＋＋Ａｓ＋注入模式提高ｔｆ的潜力可达一个量级，单位剂量提高ＳＣＣＲ效益比Ｅｒ＋＋Ｃｒ＋注入模式高１６倍，但仅为Ａｓ＋注入模式的１／５．It has previously been reported that: the control process for SCC behavior of generator retaining ring steel 50Mn18Cr4 in the nitrate solution is anodic dissolution; Er ++Cr + implantation mode can enhance t f by more than 6 times; As + implantation mode has greater improving efficiency of t f per unit dose t f/(t fA ·dose)] than Er ++Cr + implantation mode by 2 orders of magnitude. In this paper, the potentiality of As + implantation mode to enhance t f was investigated. It has been shown that the excessive dose of As + implantation mode decreases t f and limits the improvement of t f within 3 times. However, the study of Er ++As + implantation mode shows the advantages of the above two modes and its potentiality to enhance t f is up to one order of magnitude. Its improving efficiency of t f per unit dose is 16 times greater than that of Er ++Cr + implantation mode. The mechanisms of the protective effects of Er ++Cr + were discussed in terms of electrochemistry with help of results of AES PRO, RBS, XPS PRO and so on.

关 键 词：电机 护环钢 离子注入 注入模式 防腐 

分 类 号：TM303[电气工程—电机]