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电化学(中英文) ›› 2008, Vol. 14 ›› Issue (4): 427-430.  doi: 10.61558/2993-074X.1936

• 研究论文 • 上一篇    下一篇

钨酸盐对镁合金在3.5%NaCl介质中的缓蚀作用

李凌杰;姚志明;雷惊雷;贺东海;张胜涛;潘复生;   

  1. 重庆大学化学化工学院;重庆大学材料科学与工程学院;
  • 收稿日期:2008-11-28 修回日期:2008-11-28 出版日期:2008-11-28 发布日期:2008-11-28

Corrosion Inhibition of Magnesium Alloy in 3.5% NaCl Medium by Tungstate

LI Ling-jie1,2,YAO Zhi-ming1,LEI Jing-lei1*,HE Dong-hai1, ZHANG Sheng-tao1,PAN Fu-sheng2   

  1. (1.College of Chemistry and Chemical Engineering,Chongqing University,Chongqing 400044,China;2.College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China
  • Received:2008-11-28 Revised:2008-11-28 Published:2008-11-28 Online:2008-11-28

摘要: 研究钨酸钠对AZ61镁合金在3.5%NaC l腐蚀介质中的缓蚀作用.电化学阻抗谱(EIS)、Tafel极化曲线、扫描电子显微镜(SEM)等测试表明,钨酸钠缓蚀剂可有效抑制镁合金在NaC l介质中的腐蚀,当钨酸钠浓度为0.01 mol.L-1可达到较好的缓蚀效果,缓蚀效率达75.5%.钨酸钠可参与镁合金表面膜的形成,使表面膜更致密,从而抑制镁合金的腐蚀;其缓蚀作用属于阳极抑制型缓蚀机理.

关键词: 镁合金, 腐蚀, 钨酸盐, 缓蚀作用, NaCl介质

Abstract: Electrochemical impedance spectroscopy(EIS),Tafel polarization curves and scanning electron microscopy(SEM) were used to study the corrosion inhibition of AZ61 magnesium alloy in 3.5% NaCl medium with tungstate.Results showed that tungstate demonstrates strong inhibition to the corrosion of AZ61 magnesium alloy.At the concentration of 0.01 mol/L,tungstate has a high inhibition efficiency 75.5%.Tungstate is an anodic inhibitor that mainly inhibited the anodic reactions of magnesium alloy through forming a compact protective layer that covered the magnesium alloy surface active sites.

Key words: magnesium alloy, corrosion, tungstate, inhibition, NaCl medium

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