| Investigation of exfoliation corrosion of rolled AA8090 Al-Li alloy using electrochemical impedance spectroscopy |
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| 作者姓名： | 李劲风 张昭 曹发和 程英亮 张鉴清 曹楚南 |
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| 作者单位： | Department of Chemistry，Zhejiang University，Department of Chemistry，Zhejiang University，Department of Chemistry，Zhejiang University，Department of Chemistry，Zhejiang University，Department of Chemistry，Zhejiang University，Department of Chemistry，Zhejiang University Hangzhou 310027，China，Hangzhou 310027，China，Hangzhou 310027，China，Hangzhou 310027，China，Hangzhou 310027，China，State Key Laboratory for Corrosion and Protection，Institute of Metal Research，Chinese Academy of Sciences，Shenyang 110016，China，Hangzhou 310027，China，State Key Laboratory for Corrosion and Protection，Institute of Metal Research，Chinese Academy of Sciences，Shenyang 110016，China |
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| 基金项目： | Project ( 5 0 2 710 66)supportedbytheNationalNaturalScienceFoundationofChina，Project (G19990 65 0 )supportedbythe
StateKeyFundamentalResearchandDevelopmentProgramofChina |
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| 摘 要： | 1 INTRODUCTIONAl Lialloys ,comparedtotraditionalAlalloys ,havemoreexcellentproperties,suchaslowerdensi ty ,greaterelasticmodulusandhigherspecificstrength1,2 ] .Inthenearfuture ,theywillbewidelyappliedtoairplanestructures.While ,exfoliation ,amainkindoflocalizedcorrosion ,lowerstheirstrength ,plasticityandfatigueproperties ,andalsodecreasestheirservicelife35] .Soinvestigatingtheirexfoliationwillbeveryimportanttotheirapplication . Usually ,theexfoliationratingsareobservedbyna…
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Investigation of exfoliation corrosion of rolled AA8090 Al-Li alloy using electrochemical impedance spectroscopy |
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| LI Jin feng ,ZHANG Zhao ,CAO Fa he ,CHENG Ying liang ,ZHANG Jian qing ,CAO Chu nan.Investigation of exfoliation corrosion of rolled AA8090 Al-Li alloy using electrochemical impedance spectroscopy[J].Transactions of Nonferrous Metals Society of China,2003,13(2). |
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| Authors: | LI Jin feng ZHANG Zhao CAO Fa he CHENG Ying liang ZHANG Jian qing CAO Chu nan |
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| Affiliation: | LI Jin feng 1,ZHANG Zhao 1,CAO Fa he 1,CHENG Ying liang 1,ZHANG Jian qing 1,2,CAO Chu nan 1,2 |
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| Abstract: | The exfoliation morphologies and electrochemical impedance spectroscopy (EIS) features of as received rolled AA8090 Al Li alloy in EXCO solution were studied. The EIS was simulated using an equivalent circuit. The results show that once the exfoliation occurs, the EIS is composed of two capacitive arcs at high frequency and mediate low frequency; among them, the capacitance corresponding to high frequency ( C 1) is originated from original flat alloy surface, while the capacitance corresponding to mediate low frequency ( C 2) from new interface exposed to EXCO solution due to the exfoliation and the ratio of C 2 to C 1 increases with exfoliation degree. It is advanced that the exfoliation degree can be quantitatively judged through this ratio. |
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| Keywords: | rolled AA8090 Al Li alloy exfoliation degree electrochemical impedance spectroscopy (EIS) |
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