Al-Ga-Mg合金组织与阳极性能研究

MICROSTRUCTURE AND PROPERTY OF Al-Ga-Mg ALLOY

在25℃、4 mol/L KOH溶液中,测定了固溶及未固溶的Al-0.05Ga-1Mg和Al-0.1Ga-1Mg合金的开路电位、工作电位、自腐蚀速率及阳极效率,电子探针(EPMA)分析了铝阳极的基体及偏析相.结果表明,随着Ga含量的增加,开路电位变负;铝合金的偏析相中主要含Fe、Si两种元素;Mg元素能较显著降低Al-Ga合金的自腐蚀;固溶处理增多了铝合金阳极的阴极相,阴极相的增加及脱落,增大了自腐蚀,使阳极效率降低.

The open - circuit potential, work potential, self- corrosion rate and anode efficiency of Al - 0.05Ga - 1Mg,Al-0.1Ga- 1Mg （with and without thermal treatment） have been studied in 25℃ ,4 mol/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 potential of aluminum alloys move to negative with the increasing of Ga from 0.05 % to O. 1% ; Fe~ Si mainly exist in grain boundary;the content of element Mg increases after thermal treatment, that is harmful to the property of aluminum alloys; thermal treatment increases the cathode phase, the anode efficiency decreases with the cathode increasing and dropping.