热轧工艺和混合稀土对铝阳极电化学性能的影响  

Effect of Rolling Process and Mixed Rare Earth on Electrochemical Performance of Al Alloy Anodes

作　　者：梁叔全[1] 毛志伟[1] 张勇[1] 潘安强[1] 唐艳[1] 官迪凯[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083

出　　处：《腐蚀与防护》2010年第1期24-28,共5页Corrosion & Protection

基　　金：国家自然科学基金资助项目(50774097);国家自然科学基金创新研究群体科学基金项目(50721003)

摘　　要：采用计时-电位法(E-t曲线)、极化曲线、扫描电镜和能谱分析等方法研究了不同轧制工艺的Al-Mg-Sn-Bi-Ga-In和添加混合稀土的铝合金阳极在80℃,添加缓蚀剂Na_2SnO_3的5 mol/L NaOH电解液中的电化学性能和耐腐蚀性能。结果表明:按道次变形量40%进行轧制时,随着轧制温度的升高,开路电位降低,而活性和耐腐蚀性能先提高后降低;在370℃进行轧制时,随着每道次轧制变形量的增大,开路电位升高,活性逐渐降低,而耐腐蚀性能先提高后降低;在370℃,按每道次轧制变形量40%进行轧制时,随着混合稀土含量的增加,活性降低,耐腐蚀性能提高。Modern examination techniques such as galvanodynamic （E-t curves） method, Tafei curves , SEM and energy spectrum have been applied to analyze the effect of different rolling processes and mixed rare earth on electrochemical properties of A1 alloy anodes in alkaline solution （80℃, Na2 SnO2＋ 5 mol/L NaOH）. The results showed that in the amount of 40% pass deformation, as the rolling temperature got higher, the open-circuit potential falled, and the anti-corrosion properties and electrochemical activity increased at first and then decreased. At the rolling temperatures of 370℃, with increasing the pass deformation, the open-circuit potential increased and electrochemical activity gradually decreased, at the same time the anti-corrosion properties decreased at first and then increased; At 370℃, by pass deformation for 40%, with increasing the mixed rare earth content, the electrochemical activity gradually decreased and the anti-corrosion properties increased.

关 键 词：铝合金阳极 电化学性能 耐腐蚀性能 混合稀土 

分 类 号：TM911.41[电气工程—电力电子与电力传动] TG174[金属学及工艺—金属表面处理]