| 贮氢合金V3TiNi0.56Mx耐腐蚀性能研究 |
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| 引用本文： | 刘守平,田卫国,刘志红,刘小军. 贮氢合金V3TiNi0.56Mx耐腐蚀性能研究[J]. 稀有金属材料与工程, 2009, 38(1): 15-18 |
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| 作者姓名： | 刘守平 田卫国 刘志红 刘小军 |
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| 作者单位： | 重庆大学,重庆,400030 |
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| 摘 要： | 钒基固溶体贮氢合金在KOH电解质溶液中容易腐蚀,导致合金的电化学循环稳定性差,限制了钒基固溶体贮氢合金在Ni/MH电池中的应用.通过测试贮氢合金V3TiNi0.56Mx(M=Al、Cr,x=0.1、0.3)在KOH溶液浸泡过程中组织结构变化和腐蚀电位、交流阻抗谱等,研究了钒基固溶体贮氢合金V3TiNi0.56Mx的耐碱液腐蚀性能.结果表明:钒基固溶体贮氢合金在碱液中的腐蚀原因是作为导电集流体的TiNi第二相在KOH溶液中的不断溶解;在合金V3TiNi0.56中添加Al和Cr元素,可阻止合金中分布于晶界的TiNi第二相的溶解,使合金的腐蚀电位提高,从而提高钒基固溶体贮氢合金的酎碱液腐蚀能力.
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| 关 键 词： | 钒基贮氢合金 Ni/MH电池 耐腐蚀性能 |
| 收稿时间： | 2008-07-20 |
Investigation on the Corrosion Resistance of V3TiNi0.56Mx Hydrogen Storage Alloy in Alkaline Solution |
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| Liu Shouping,Tian Weiguo,Liu Zhihong and Liu Xiaojun. Investigation on the Corrosion Resistance of V3TiNi0.56Mx Hydrogen Storage Alloy in Alkaline Solution[J]. Rare Metal Materials and Engineering, 2009, 38(1): 15-18 |
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| Authors: | Liu Shouping Tian Weiguo Liu Zhihong Liu Xiaojun |
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| Affiliation: | College of Material Science and Engineering, Chongqing University, Chongqing 400030, China |
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| Abstract: | Vanadium-based hydrogen storage alloys are easily corroded in KOH solution, which leads to their poor electrochemical cyclic durability in alkaline solution and limits their application in the Ni/MH battery. In this paper, the structure transformation of V3TiNi0.56Mx alloys during full immersion corrosion in alkaline solution was investigated; the corrosion potentials, the Tafel curves and the impedance spectra were tested for the V3TiNi0.56Mx alloys in alkaline solution. The results show that the corrosion... |
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| Keywords: | vanadium-based hydrogen storage alloy Ni/MH battery corrosion resistance |
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