研究了Ga含量对Al-Zn-In-Mg-Ga-Mn牺牲阳极性能的影响规律及其在干湿交替条件下的活化机制.结果表明:Ga含量在0.02％(质量分数)时,Al-Zn-In-Mg-Ga-Mn牺牲阳极在干湿交替环境下综合电化学性能最佳.金相组织观察和腐蚀产物EDS分析得出,随着Ga含量的增加,Ga在晶界处富集,由于Ga的活化作用,晶界处优先溶解造成晶粒的脱落,电流效率急剧下降；活性元素Ga和In在溶解反应时发生共同沉积现象,破坏了基体表面氧化膜的完整性和致密性,有效地维持了阳极的活性溶解.%The activation mechanism of anodes under condition of wet and dry cycle and effect of Ga content on anodes performance of Al-Zn-In-Mg-Ga-Mn was investigated. The results show that the anodes performance of Al-Zn-In-Mg-Ga-Mn under condition of wet and dry cycle is best when the Ga content is 0. 02%(mass fraction). With the increase of Ga content, Ga is enriched at the grain boundary where was dissolution firstly because activation of Ga, which resulted grain flaked away and its current efficiency decreased. In the process of anodes dissolution, Ga and In both redeposited on the surface of anodes and oxide film was destroyed which promoted anodes to dissolve efficiency.
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