【摘要】 在510℃对Al5Zn1Mg0.1Sn0.015In及添加了RE元素的铝合金进行了固溶处理,在25℃,4mol/L KOH中测定了它们的基本性能。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:添加稀土后细化了晶粒;固溶处理使In、Sn、Mg、Zn等活化元素均匀分布,增加了反应活化点,改善了铝合金阳极的性能;RE相及Fe相中活性元素的减少,降低了晶界的活性,减少了晶界腐蚀;但是由于RE相的数量增加,及合金活性的增加,使电极的腐蚀速率呈不规则变化。更多还原

【Abstract】 The open-circuit potential,self-corrosion rate and anode efficiency of Al-Zn-In-Sn-Mg(-RE) (thermal treatment and not thermal treatment) have been studied in 25℃,4mol/L KOH solution, and the change of main segregation of anodes have been researched by EPMA and energy spectrum analysis. The results show that the segregation in aluminum alloys decreased and the elements such as In,Mg,Sn,Zn dispersed in aluminum equably after thermal treatment. The activity of aluminum alloys increased and the activity of the grain boundary decreased.更多还原