研究了铜及Cu-2.80%Sn-1.06%Al合金在3.0%NaCl溶液及流动海水中腐蚀性能，利用金相、扫描电镜及电化学特征分析了它们的耐蚀特性。结果表明，纯铜在21 mV时发生阳极溶解，在海水冲刷作用下保护膜很快遭到破坏，腐蚀速度大。Cu-2.80%Sn-1.06%Al合金由于其表面形成的Cu、Sn和Al的混合氧化物保护膜均匀、致密、质硬，在流动海水冲刷、摩擦作用下，保护膜稳定性好，腐蚀速度小。
The corrosion resistances of Cu- Sn- Al alloy and Cu in 3.0％ NaCl solution and flowing seawater were studied by OM,SEM and electrochemical methods.It showed that copper could dissolve in 3.0％ NaCl at low potential(21 mV)and its corrosion rate increased in flowing seawater.The Cu- Sn- Al alloy revealed itself good erosion corrosion resistance in flowing water owing to the formation of stable and uniform complex protecting film of SnO2,Al2O3 and Cu2O.
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