摘要
在 510℃对Al 5Zn 0 0 5In 0 1Sn 1Mg阳极分别进行 4h、10h固溶处理 ,测定了它们的基本电化学性能。采用电子探针 (EPMA)和能谱分析 ,考察了主要析出相形貌和成分的变化。结果显示 :固溶处理使铝合金阳极沿晶界分布的复合金属化合物有Sn掺入 ,并使之球化 ;固溶处理增大了铝合金阳极晶界腐蚀甚至使晶粒脱落 ,使铝合金阳极电流效率下降 ;
The microstructure of A1 Zn In Sn Mg anodes treated at 510℃ for 4h or 10h respecty, and their electrochemistry performance have been measured , and the change of main segregation of anodes have been researched by EPMA and energy spectrum analysis. The result showed that, due to water-quenching, the AlZnMgFe segregation changed to AlZnSnMgFe segregation, the grain boundary segregation fractured, increased the grain boundary corrosion and dropping of grain, and reduced the current efficiency of aluminum anodes. The exist of tin on grain boundary increased the grain boundary corrosion.
关键词
铝合金
牺牲阳极
固溶处理
显微组织
电化学性能
aluminum alloy
\ sacrificial anode
\ water-quenching
\ microstructure
\ electrochemistry performance
