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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (22): 2363-2366. 上一篇    下一篇

研究论文

冷却速度对铅酸蓄电池用Pb-Ca合金性能的影响

秦春段，苏勇*，刘福东   

  1. (合肥工业大学材料学院 合肥 230009)
  • 投稿日期:2010-06-05 修回日期:2010-07-13 发布日期:2010-07-17
  • 通讯作者: 秦春段 E-mail:chunduan@163.com
  • 基金资助:

    安徽省高等学校省级自然科学基金重点项目

The Effect of Solidification Cooling Rates on the Performance of Pb-Ca Alloy for Lead-acid Battery

QIN Chun-Duan, SU Yong, LIU Fu-Dong   

  1. (School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009)
  • Received:2010-06-05 Revised:2010-07-13 Published:2010-07-17

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被引次数

2

实验采用交流阻抗(EIS)谱图, 塔菲尔(Tafel)曲线, 阴极极化等电化学测试研究不同冷却速度下的Pb-Ca合金的电化学性能, 并用金相显微镜观察微观组织. 结果表明: 冷却速度增大, 晶粒细化, 阳极膜钝化层的稳定性增强, 耐腐性改善, 析氢过电位提高, 但过于细化的组织增加晶界面积和晶体缺陷反而会恶化合金的电化学性能.

关键词: 冷却速度, Pb-Ca合金, 显微组织, 耐腐蚀性, 析氢过电位

The effect of cooling rates on the electrochemical behavior of the Pb-Ca alloys was studied by use of electrochemical impedance spectroscopy, tafel plot and cathodic potentiodynamic polarization. Metallographic microscope was taken to investigate the microstructure. It was found that increasing cooling rates could decrease the grain size, strengthen the stability of anode passivation layer, improve corrosion resistance and hydrogen evolution over-potential. But over-fined structure which increased the grain boundary area and crystal defect would worsen the electrochemical performance of Pb-Ca alloys.

Key words: cooling rates, Pb-Ca alloys, microstructure, corrosion resistance, hydrogen evolution over-potential