固溶处理对Al-Zn-In阳极元素分布和电化学性能的影响  

Influence of heat treatment on elements distribution and electrochemical properties of Al-Zn-In anode

作　　者：齐公台[1] 邱于兵[1] 蔡启舟 冉伟 

机构地区：[1]华中科技大学化学与化工学院,湖北武汉430074

出　　处：《材料热处理学报》2009年第1期75-79,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(50671041)

摘　　要：对Al-2Zn-0.03In阳极分别进行"510℃×10h+空气冷却"和"510℃×10h+水冷却"处理,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,测定了铝阳极的基本电化学性能。结果表明:固溶处理使铝阳极晶内和晶界析出物中的Zn含量降低而Fe、Si被保留,Al-Zn金属间化合物数量减少,晶界析出物发生断裂、球化现象。基体中Zn的增加和晶界Al-Zn化合物数量减少削弱了铝阳极析氢腐蚀和晶间腐蚀,使铝合金阳极电流效率提高。The Al-5Zn-0.031n alloy anodes were treated at 510℃ for 10h, and then were cooled by air or water, respectively. A JXA-8800 electron probe microanalyzer and an EDAX quantitative energy dispersive X-ray analyser were used to examine the microstrueture of the anodes before and after heat treatment, and electrochemical properties of the anodes were tested. By heat treatment, the solubility of Zn in aluminum is increased and that of Fe and Zn is retained un-change, the quantity of A1-Zn metallic compounds is evidently decreased, the strip precipitates along grain boundaries is broken to spheric shape. With the increasing of Zn content in aluminum matrix and the reducing of A1-Zn metallic compounds precipitated along grain boundaries, the hydrogen evolution corrosion and intergranular corrosion of the aluminum anode are weakened, and it leds to the high current efficiency for aluminum alloy anode.

关 键 词：铝合金 牺牲阳极 固溶处理 显微组织 电化学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG156.94[金属学及工艺—金属材料]