室温轧制及固溶处理对Al-Ga-Mg-Mn-Bi阳极合金电化学性能的影响.PDF

第26 卷 第4 期 腐蚀科学与防护技术腐蚀科学与防护技术 Vol.26 No.4 2014 年7 月 CORROSION SCIENCE AND PROTECTION TECHNOLOGY Jul. 2014 室温轧制及固溶处理对Al-Ga-Mg-Mn-Bi 阳极 合金电化学性能的影响 1 1,2 1,2 1 李登辉 文九巴 贺俊光 高军伟 1. 河南科技大学材料科学与工程学院 洛阳 471023; 2. 河南省有色金属共性技术协同创新中心 洛阳 471023 摘要：对Al-Ga-Mg-Mn-Bi 阳极合金固溶处理和常温轧制变形，测量不同处理状态下的电化学阻抗谱、极化曲 线、自腐蚀速率等，研究固溶和轧制处理对该合金的组织及电化学性能的影响。结果表明：与铸态试样相比， 固溶处理减少了铝阳极组织中第二相的数量，较大程度地降低铝阳极的自腐蚀和析氢速率，改善了合金的腐 蚀形貌，使恒流放电的电位负移；轧制处理使恒流放电的电位负移，能够明显改善铝阳极的腐蚀形貌。 关键词：电化学性能 铝阳极合金 轧制处理 固溶处理 中图分类号：TG 174.41 文献标志码：A 文章编号：1002-6495(2014)04-0350-05 Effect of Rolling and Solution Treatment on Electrochemical Properties of Al-Ga-Mg-Mn-Bi Anode Alloy 1 1,2 1,2 1 LI Denghui , WEN Jiuba , HE Junguang , GAO Junwei 1. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China; 2. Henan Synergistic Innovation Center for Non-ferrous Metal Generic Technology, Luoyang 471023, China Abstract: Influence of solution treatment and cool rolling deformation on the microstructure and electrochemical performance of the Al-Ga-Mg-Mn-Bi anode alloy was investigated by measuring the impedance spectroscopy, polarization curve, free-corrosion rate, etc. The results show that: in comparison with the cast alloy, the quantity of the second phase, the free-corrosion rate and the hy- drogen evolution rate of the solution-treated alloy were greatly reduced, while the amount and size of corrosion pits were also reduced with