Abstract

采用电化学方法研究了浓度、温度、阴阳极面积比的变化对乙二醇水溶液中3A21铝合金/H62黄铜(Al/Cu)、3A21铝合金/304不锈钢(Al/SS)两种电偶对的腐蚀行为的影响。通过扫描电子显微镜观察了电偶对中铝合金局部腐蚀形貌。结果表明:随着乙二醇浓度的升高,Al/Cu和Al/SS电偶对的平均电偶电流密度Ig下降。随着温度的升高或Sc/Sa比例的增大,Al/Cu和Al/SS电偶对的Ig增大;相同条件下,Al/Cu电偶对Ig均大于Al/SS电偶对,Al/Cu和Al/SS两种电偶对具有相似的电偶腐蚀规律。

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