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研究论文

Mg_(2-x)La_xNi及Mg_(2-x)Ce_xNi合金的腐蚀性能研究

  • 张海昌 ,
  • 杨化滨 ,
  • 王军红 ,
  • 周作祥
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  • 南开大学新能源材料化学研究所,南开大学新能源材料化学研究所,南开大学新能源材料化学研究所,南开大学新能源材料化学研究所 天津300071 ,天津300071 ,天津300071 ,天津300071

收稿日期: 2005-02-28

  修回日期: 2005-02-28

  网络出版日期: 2005-02-28

Corrosion Behavior of Mg_(2-x)La_xNi and Mg_(2-x)Ce_xNi Hydrogen Storage Alloy

  • ZHANG Hai-chang ,
  • YANG Hua-bin~ ,
  • WANG Jun-hong ,
  • ZHOU Zuo-xiang
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  • (College of Chemistry Institute of New Energy Material Chemistry,Nankai University,Tianjin 300071,China

Received date: 2005-02-28

  Revised date: 2005-02-28

  Online published: 2005-02-28

摘要

应用电化学方法研究了Mg2-xLaxNi及Mg2-xCexNi储氢合金的腐蚀性能.恒电位极化和交流阻抗测试表明,经Ce或La取代后的合金,其前者腐蚀电流及电化学极化电阻均随Ce取代量增加而降低,而后者的腐蚀电流却随La取代量的增加而增加,但极化电阻则呈先降后升趋势.合金极化后SEM测试显示,经Ce取代后合金表面较平整,而用La取代的则明显有裂纹.作者认为这主要与La、Ce的氧化物的结构有关.

本文引用格式

张海昌 , 杨化滨 , 王军红 , 周作祥 . Mg_(2-x)La_xNi及Mg_(2-x)Ce_xNi合金的腐蚀性能研究[J]. 电化学, 2005 , 11(1) : 12 -15 . DOI: 10.61558/2993-074X.1606

Abstract

The corrosion behavior of Mg-base hydrogen storage alloys has been investigated by potentiodynamic polarization and EIS. The results showed that the corrosion current density (i_(corr) ) and the electrochemical polarized resistance of Mg_(2-x)Ce_xNi alloys decreased with x increase, while i_(corr) of Mg_(2-x)La_xNi alloys increased and the electrochemical polarized resistance of Mg_(2-x)La_xNi alloys increased first, then decreased with x increase. SEM results showed that the surface of Mg_(1.85)Ce_(0.15)Ni alloy was relatively even while the surface of Mg_(2-x)La_xNi alloy had remarkedly cracks. The different behavior between Ce and La may be relevant to the structure of Ce, La oxides.

参考文献

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