QAl10-4-4、QAl9-4和ZCuAl10Fe3铜合金在模拟海洋环境中的腐蚀行为

Corrosion Behaviors of QAl10-4-4,QAl9-4and ZCuAl10Fe3 Copper Alloys in Simulated Marine Environment

为了系统研究QAl10-4-4、QAl9-4、ZCuAl10Fe3三种铜合金在海洋环境中的腐蚀行为,在实验室进行了人造海水全浸试验、盐雾/干/湿交替循环试验、电偶腐蚀试验和电化学测试等一系列腐蚀模拟试验。结果表明:这三种铜合金在模拟海洋环境全浸条件下的腐蚀速率排序为QAl10-4-4<ZCuAl10Fe3<QAl9-4,在模拟海洋环境潮差条件下的腐蚀速率排序为ZCuAl10Fe3<QAl10-4-4<QAl9-4;当0Cr17Ni4Cu4Nb不锈钢作为阴极,三种铜合金作为阳极时,三种铜合金的腐蚀速率排序为QAl9-4>QAl10-4-4>ZCuAl10Fe3,电偶腐蚀倍率为QAl10-4-4>ZCuAl10Fe3>QAl9-4;同时,三种铜合金表面氧化膜的腐蚀阻滞作用大小排序为QAl10-4-4>QAl9-4>ZCuAl10Fe3,材料抗介质腐蚀能力的排序为QAl10-4-4>ZCuAl10Fe3>QAl9-4。

Corrosion behaviors of QAl10-4-4, QA19-4 and ZCuAll0Fe3 copper alloy materials in marine environment were systemically characterized through full immersion experiment in artificial sea water, salt fog/wet/dry alternate circulation experiment, galvanic corrosion experiment and electrochemical experiment. The results showed that the corrosion rates of the three copper alloy materials in the artificial sea water followed the order of QAll0-4-4〈 ZCuAI10Fe3〈QA19-4, and the corrosion rates in the simulated tidal cycles followed the order of ZCuAll0Fe3〈 QAI10-4-4〈QA19-4. When 0Crl7Ni4Cu4Nb stainless steel acted as cathode and the studied materials acted as anode, the corrosion rate of the studied materials followed the order of QA19-4〉QAll0-4-4〉ZCuAll0Fe3, and the multiple ratios of galvanic corrosion followed the order of QAll0-4-4 〉 ZCuAll0Fe3 〉 QA19-4. Moreover, the corrosion retardation of the surface oxidation film on the studied materials followed the order of QA110-4-4 〉 QA19-4 ZCuAIIOFe3, and the corrosion resistance of the materials against media followed the order of QAI10-4-4 ZCuAll 0Fe3〉QA19-4.