| 模拟偏析相Al2Zn在3%NaCl溶液中的电化学行为 |
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| 引用本文： | 刘斌,齐公台,冉伟,赵婷婷.模拟偏析相Al2Zn在3%NaCl溶液中的电化学行为[J].中国腐蚀与防护学报,2007,27(2):93-96. |
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| 作者姓名： | 刘斌 齐公台 冉伟 赵婷婷 |
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| 作者单位： | 华中科技大学化学系,武汉,430074 |
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| 摘 要： | 根据Al-Zn-In合金中偏析相Al2Zn的元素组成熔炼出模拟偏析相合金,测试了模拟偏析相合金和Al-Zn-In合金的自腐蚀电位、极化曲线和交流阻抗谱.结果表明:相对于Al-Zn-In合金,模拟偏析相Al2Zn自腐蚀速率小,自腐蚀电位负,呈现阳极性;Al-Zn-In合金中的偏析相Al2Zn与合金基体构成微区电偶腐蚀,受到阳极极化优先溶解,引起阳极电流效率的损失.
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| 关 键 词： | 偏析相 电化学行为 电流效率 |
| 文章编号： | 1005-4537（2007）02-0093-04 |
| 修稿时间： | 2006-04-14 |
ELECTROCHEMICAL BEHAVIOR OF THE SIMULATED Al2Zn SEGREGATION IN 3%NaCl SOLUTION |
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| LIU Bin,QI Gongtai,RAN Wei,ZHAO Tingting.ELECTROCHEMICAL BEHAVIOR OF THE SIMULATED Al2Zn SEGREGATION IN 3%NaCl SOLUTION[J].Journal of Chinese Society For Corrosion and Protection,2007,27(2):93-96. |
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| Authors: | LIU Bin QI Gongtai RAN Wei ZHAO Tingting |
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| Affiliation: | Department of Chemistry, Huazhong University of Science and Technology, Wuhan 430074 |
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| Abstract: | Simulated Al2Zn segregation alloys were developed according to the average elements distribution of zinc enriched zones of Al-Zn-In alloy.Open circuit potential against time,polarization curves,and electrochemical impedance spectroscopy were employed to study the electrochemical behavior of Al-Zn-In and simulated Al2Zn alloys.The results showed that the simulated Al2Zn alloy exhibits a more electronegative open circuit potential and a lower self-corrosion rate as compared with those of Al-Zn-In alloy.However,the Al2Zn segregation in Al-Zn-In alloy can be attributed to the formation of micro-local galvanic corrosion that leads to the preferential dissolution of Al2Zn and the loss of current efficiency. |
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| Keywords: | Al-Zn-In Al2Zn |
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