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.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
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)
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
solution treatment
microstrueture
electrochemical property
