AZ61镁合金轧制板材的腐蚀行为研究  

Investigation on Corrosion Behavior of AZ61 Magnesium Alloy Rolled Sheet

作　　者：李凌杰[1] 王莎[1] 雷惊雷[1] 于生海[1] 张胜涛[1] 潘复生[1] 

机构地区：[1]重庆大学,重庆400044

出　　处：《稀有金属材料与工程》2011年第11期2018-2021,共4页Rare Metal Materials and Engineering

基　　金：国家杰出青年科学基金(50725413);重庆市自然科学基金(CSTC;2009BA4023);重庆大学211工程创新人才培养计划(S-09103);中央高校基本科研业务费(CDJRC10220002)

摘　　要：采用动电位极化曲线和电化学阻抗谱方法研究了AZ61镁合金轧制板材的表面、侧面、截面在模拟海水中的腐蚀电化学行为,采用扫描电子显微镜对3个面的腐蚀形貌进行了观察。结果表明,AZ61镁合金轧制板材的表面、侧面、截面在模拟海水中的腐蚀均以孔蚀为主要特征;3个面腐蚀倾向由小到大的顺序为:表面<侧面<截面,耐蚀性能由优到劣的顺序为:表面>侧面>截面;造成3个面腐蚀行为及耐蚀性能不同的根本原因是轧制处理引起的材料微观组织的各向异性。Potentiodynamic polarization curve and electrochemical impedance spectroscopy（EIS） techniques were employed to investigate the corrosion electrochemical behavior of the different faces of AZ61 magnesium alloy rolled sheets in simulated sea water.The surface morphology of the level,the side and the cross section of the corroded rolled sheet was observed using scanning electron microscopy（SEM）.Results show that the major corrosion form of the different faces is pitting for the rolled sheet in simulated sea water.The corrosion tendency of the three faces of the rolled sheet is levelsidecross section and their corrosion resistance order is opposite.The rolling brings about different effects on the microstructure of the three faces of the sheet,which determines their different anti-corrosion performance.

关 键 词：腐蚀 镁合金 轧制处理 耐蚀性能 微观组织 

分 类 号：TG171[金属学及工艺—金属表面处理]