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Cu、Mn的协同作用对低合金钢在模拟海洋大气环境中腐蚀的影响

, PP. 235-238

Keywords: 干湿交替,海洋大气环境,耐候钢,协同作用

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Abstract:

用增重法、扫描电镜、X射线衍射、电子探针和X射线光电子能谱等手段研究了在模拟海洋大气干湿交替环境下16Mn钢和Cu-Mn耐候钢的腐蚀行为及Cu、Mn共添加对低合金钢腐蚀行为的影响.结果表明Cu-Mn耐候钢的腐蚀速率低于16Mn钢,其锈层更致密;两种钢的铁锈均由Fe3O4,α-FeOOH,β-FeOOH,γ-FeOOH和大量无定形相组成;添加Cu使Fe3O4含量增加,添加Mn使γ-FeOOH含量减少;Cu在Cu-Mn耐候钢锈层中以CuFeO2存在;Mn在两种钢锈蚀初期以MnO存在,后期为Mn3O4.Cu、Mn的协同作用使Cu-Mn耐候钢抗大气腐蚀性能优于16Mn钢.

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