铁轨钢与不锈钢在模拟雨水环境中的电偶腐蚀行为  

Research on Galvanic Corrosion Behavior of the U71Mn Rail Steel and Stainless Steel in the Simulated Rain Environment

作　　者：鲜宁[1] 刘道新[1] 谭宏斌[1] 

机构地区：[1]西北工业大学腐蚀与防护研究室,陕西西安710072

出　　处：《材料保护》2007年第12期63-66,共4页Materials Protection

基　　金：国家自然科学基金资助项目(50171054)

摘　　要：采用电化学测试技术和盐雾腐蚀试验方法,研究了U71Mn铁轨钢与1Cr13、2Cr13、1Cr18Ni9三种不锈钢在模拟雨水环境中的电偶腐蚀行为,以期为解决火车在站位置检测技术提供依据。结果表明:当阴、阳极面积相等时,U71Mn钢与三种不锈钢间的电偶腐蚀敏感性均较高,其中在模拟酸雨环境中,三种电偶对的腐蚀电流较为接近;而在中性环境中,1Cr18Ni9/U71Mn电偶对的腐蚀电流最大。在模拟酸雨环境中,对于大阳极/小阴极焊接结构,不锈钢阴极腐蚀轻微,U71Mn阳极腐蚀严重,但是以自腐蚀为主,电偶腐蚀影响较小。中性雨水环境中铁轨钢上焊接1Cr13不锈钢带,酸雨环境中铁轨钢上焊接1Cr18Ni9不锈钢带,是解决火车在站位置检测的可行性技术途径。Galvanic corrosion behaviors of rail steel U71 Mn and stainless steel including 1Crl3,2Crl3 and 1Cr18Ni9 were investigated by electrochemical test and salt spray test in the simulated rain environment in order to solve the inspection problem of train location in railway station. The results indicated that the galvanic corrosion sensitivity of the U71Mn steel with three stainless steels was high. The galvanic corrosion sensitivity of the U71 Mn steel with the three stainless steels was similar in the simulated sour rain environment, while the galvanic corrosion current of the U71 Mn steel coupled with 1Cr18Ni9 was the highest one among the three galvanic couples in simulated neutral environment. For the welded structure of large U71 Mn steel cathode coupled with small stainless steel anode in simulated sour rain environment, the stainless steel cathode was eroded slightly and U71 Mn anode was eroded remarkably, but the self-corrosion of the rail steel was primary and galvanic corrosion was secondary. The rail steel U71Mn welded by lCrl3 steel in neutral rain environment or by lCrl8Ni9 steel in acid rain environment could be used to solve the problem of inspecting train location in railway station.

关 键 词：铁轨钢 不锈钢 电偶腐蚀 盐雾试验 雨水环境 

分 类 号：TG174.3[金属学及工艺—金属表面处理]