单轨列车用铝合金与镁合金在NaCl溶液中的电偶腐蚀行为研究  

Study on Galvanic Corrosion of Magnesium Alloys Coupled with Aluminum Alloy of Monorail Train in NaCl Solution

作　　者：徐亚娟[1] 陈昌国[1] 张丁非[2] 刘渝萍[1] 陈浩[1] 

机构地区：[1]重庆大学化学化工学院,重庆400044 [2]重庆大学材料科学与工程学院,重庆400044

出　　处：《有色金属（冶炼部分）》2011年第9期28-32,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金："十一五"科技支撑计划项目(2007BAQ00134-04);重庆市科技攻关计划项目(CSTC2009AB4008)

摘　　要：采用浸泡失重、SEM、XRD等方法研究了AZ31镁合金与A6N01S-T5铝合金偶接后在3.5%NaCl溶液中电偶腐蚀行为。结果表明,浸泡腐蚀试验时间越长,偶对中AZ31镁合金、A6N01S-T5铝合金的腐蚀失重量越大,但是平均腐蚀速率则呈下降趋势。在偶对中AZ31镁合金作为阳极腐蚀加速,A6N01S-T5铝合金作为阴极,与镁合金接触的部分得到保护,而暴露在溶液中的部分发生了严重的阴极腐蚀。The galvanic corrosion behavior of magnesium alloy AZ31 coupled with aluminum alloy A6N01S-T5 in 3.5% NaCl solution was investigated by the immersion test and weight loss,SEM and XRD.The results showed that the weight losses of two metals increased with the increasing of immersion time,but the average corrosion rates reduced gradually.Magnesium alloy AZ31 was accelerated as anode in galvanic corrosion and the contact surface of aluminum alloy A6N01S-T5 with Mg alloy was protected as cathode.However the other part of aluminum alloy in 3.5% NaCl solution also suffered serious cathodic corrosion.

关 键 词：镁合金 铝合金 NACL溶液 电偶腐蚀 

分 类 号：TG146.21[一般工业技术—材料科学与工程]