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电化学(中英文) ›› 2008, Vol. 14 ›› Issue (1): 95-99.  doi: 10.61558/2993-074X.1871

• 研究论文 • 上一篇    下一篇

AZ31和AZ61镁合金在模拟海水中的腐蚀电化学行为

李凌杰;于生海;雷惊雷;刘传璞;张胜涛;潘复生;   

  1. 重庆大学化学化工学院,重庆大学化学化工学院,重庆大学化学化工学院,重庆大学材料科学与工程学院,重庆大学化学化工学院,重庆大学材料科学与工程学院 重庆400044,重庆大学材料科学与工程学院,重庆400044,重庆400044,重庆400044,重庆400044,重庆400044,重庆400044
  • 收稿日期:2008-02-28 修回日期:2008-02-28 出版日期:2008-02-28 发布日期:2008-02-28

Corrosion Electrochemical Behavior of AZ31 and AZ61 Magnesium Alloys in Simulated Sea Water

LI Ling-jie1,2,YU Sheng-hai1,LEI Jing-lei1,LIU Chuan-pu2,ZHANG Sheng-tao1,PAN Fu-sheng2   

  1. (1.College of Chemistry and Chemical Engineering,Chongqing University,Chongqing 400044;2.College of Materials Science and Engineering,Chongqing University,Chongqing 400044
  • Received:2008-02-28 Revised:2008-02-28 Published:2008-02-28 Online:2008-02-28

摘要: 应用极化曲线、电化学阻抗谱方法研究了两种Mg-Al-Zn系合金——AZ31和AZ61在模拟海水中的腐蚀电化学行为.根据两种镁合金在浸泡过程中腐蚀介质pH值的变化以及扫描电子显微镜对合金微观金相组织和腐蚀形貌的观察,讨论了镁合金的腐蚀机理及合金元素Al的含量对镁合金耐蚀性能的影响.结果表明,AZ61镁合金具有比AZ31镁合金更好的耐蚀性能,其原因主要是AZ61镁合金中Al含量较高使合金的微观组织结构更有利于耐蚀性能的提高.

关键词: 镁合金, 模拟海水, 腐蚀, 合金元素

Abstract: Tafel polarization curves and electrochemical impedance spectroscopy(EIS) techniques were employed to investigate the corrosion electrochemical behavior of AZ31 and AZ61 magnesium alloys.Scanning electron microscopy(SEM) was used to observe the alloy microstructure and corrosion morphology.The variation of the bulk corrosive medium pH with immersion time was recorded during the exposure of the alloys to simulated sea water.Results show that AZ61 magnesium alloy exhibits much better anti-corrosion ability than AZ31 magnesium alloy.The different corrosion behavior between the two magnesium alloys is correlated with their different content of Al alloying element.The higher content of Al in AZ61 alloy leads to the homogenerous microstructure and the strong surface passivation,which is helpful for improving the alloy corrosion resistance.

Key words: magnesium alloy, simulated sea water, corrosion, alloying element

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