2B96K铝锂合金剥蚀过程的电化学阻抗研究
Electrochemical Impedance Spectroscopy during Exfoliation Corrosion Process of 2B96K Al-Li Alloy
摘 要
研究了不同时效状态下的 2B96K铝锂合金在EXCO溶液中剥蚀的电化学阻抗特征.结果表明,腐蚀初期,合金的电化学阻抗谱由一个容抗弧及一个感抗弧组成,一旦发生剥蚀,即变成两个容抗弧.对于欠时效合金,这两个容抗弧出现的时间较长,表明其剥蚀发展较慢.对电化学阻抗谱进行了拟合分析,得到了剥蚀的相关信息,如剥蚀的发展及形貌等.
Al-Li合金
电化学阻抗谱(EIS)
exfoliation corrosion
Al-Li alloy
electrochemical impedance spectroscopy (EIS)
Abstract
The electrochemical impedance spectroscopy (EIS) during exfoliation corrosion process of 2B96K Al-Li alloy with different aging treatments in EXCO solution was studied.At the beginning of corrosion,the EIS was comprised of a capacitive arc and an inductive loop.Once exfoliation corrosion occurred,two capacitive arcs appeared.The longer appearance time of two capacitive arcs of the under-aged alloy indicated its slower corrosion development.The simulated EIS analysis was done,the information such as developing and feature of exfoliation corrosion was goet.
中图分类号 TG172 TG146.2
所属栏目 试验研究
基金项目
收稿日期 2008/10/7
修改稿日期 2008/10/30
网络出版日期
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引用该论文: LI Yu-qi,HU Zhi-liu,JIANG Hong-jie. Electrochemical Impedance Spectroscopy during Exfoliation Corrosion Process of 2B96K Al-Li Alloy[J]. Corrosion & Protection, 2009, 30(5): 312～315
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参考文献
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【4】ASTM G34-79.Exfoliation corrosion susceptibilityin 2×××and 7×××series aluminium alloys (EXCO test )[S].
【5】苏景新,张昭,曹发和,等.T6态2090 A1-Li合金在 EXCO溶液中的剥蚀行为和剥蚀发展过程中的电化学阻抗谱[J].金属学报,2005,25(7):974-978.
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