凝固速度对镁合金阳极组织与性能的影响  

Effect of Solidification Rate on Microstructure and Properties of Mg Alloy Anode

作　　者：马正青[1] 左列[1] 曾苏民[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《材料保护》2007年第10期9-11,共3页Materials Protection

摘　　要：以Mg-Hg-X合金为研究对象,利用金相显微镜、扫描电子显微镜、电化学测试仪等研究了不同铸造凝固速度对镁合金阳极经混合酸侵蚀后显微组织、电化学性能和腐蚀速率的影响。结果表明,Mg-Hg-X合金中Mg、Hg形成的第二相化合物组成随合金铸造凝固速度变化而改变,缓慢凝固主要形成Mg3Hg相,快速凝固主要形成Mg2Hg相;同时随铸造凝固速度加快,Mg-Hg-X合金材料腐蚀速率有所降低,电极电位正移。The influences of the solidification rate on microstructure and performances of Mg- Hg- X alloy anodes have been studied by metallography, electrochemical testing and SEM. The results showed that as the solidification rate of Mg alloy was increased, the grains and the second - phase compound of Mg alloy became finer and the discharge voltage of Mg - Hg - X alloy anodes was decreased, but with improved corrosion resistance.

关 键 词：镁合金阳极 铸造凝固速度 腐蚀 组织 电化学性能 

分 类 号：TG27[金属学及工艺—铸造]