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
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Na2SnO3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.
电化学性能
耐腐蚀性能
混合稀土
aluminum alloy anode
electrochemical property
anti-corrosion property
mixed rare earth
Abstract
Modern examination techniques such as galvanodynamic(E-t curves) method,Tafel curves ,SEM and energy spectrum have been applied to analyze the effect of different rolling processes and mixed rare earth on electrochemical properties of Al alloy anodes in alkaline solution(80 ℃,Na2SnO3 + 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.
中图分类号 TM911.41 TG174
所属栏目 试验研究
基金项目 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)
收稿日期 2008/12/29
修改稿日期 2009/1/6
网络出版日期
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备注梁叔全,教授.
引用该论文: LIANG Shu-quan,MAO Zhi-wei,ZHANG Yong,PANG An-qiang,TANG Yan,GUAN Di-kai. Effect of Rolling Process and Mixed Rare Earth on Electrochemical Performance of Al Alloy Anodes[J]. Corrosion & Protection, 2010, 31(1): 24～28
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参考文献
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【15】Li Zhenya,Qin Xue,Yu Yuanbin,et al.The Electrochemical behavior of Al alloys containing tin and gallium in alkaline electmlyte[J].Acta Phys co-chimtca Stnica,1999,15(4):381-384．
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