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第2期 杨胜等：航空AC一Mg合金剥落腐蚀行为 219. 高频容抗和中一低频感抗的分析，发现腐蚀的界面 luminum alloys for aerospace applications.Mater Sci Eng A.2000 过程依次经历氧化膜的溶解、表面腐蚀产物的形成、 (5):62 [8]Starke E A.Jr.Staleyt J T.Application of modern aluminum al- 吸附及脱落一系列过程， loys to aireraft.Prog Aerosp Sci.1996.32:131 参考文献 [9]ASTM.Standard test method for exfoliation corrosion susceptibil- ity in 2xxx and 7xxx series aluminum alloys (EXCO test).USA. [1]Hoffman M E,Hoffman P C.Corrosion and fatigue research 1985 structural issues and relevance to naval aviation.Int J Fatigue [10]Posada M,Murr L E,Niou C S.Exfoliation and related mi 2001,23(1):1 crostructures in 2024 aluminum body skins on aging aireraft [2]李劲风，曹发和，张昭，等.铝合金剥蚀敏感性及其定量研究方 Mater Charact.1997.38:259 法.中国腐蚀与防护学报，2004,24(1)：55 [11]Conde A.de Damborenea J.Electrochemical modeling of exfoli- [3]Li D.Hu Y L.Guo B L.Study on the evaluation of localized cor- ation corrosion behavior of 8090 alloy.Electrochem Acta.1998. rosion of 2024T3 aluminum alloy with EIS.Mater Sci Eng 43(8):849 2000,A280:173 [12]Conde A.de Damborenea J Evaluation of exfoliation suscepti- [4]曹楚南.腐蚀电化学.北京：化学工业出版社，1994：91 bility by means of the electrochemical impedance spectroscopy [5]Keddam M,kuntz C.Takenouti H.Exfoliation corrosion of alu- Corros Sci,2000,42.1363 minum alloys examined by electrode impedance.Electrochem Ac- [13]Cai C.Li J F.Zheng Z Q.Exfoliation corrosion susceptibility of ta,1997(1):87 8090 Al-Li alloy examined by electrochemical in dance pee- [6]Cassada W,Liu J,Taley J.Aluminum alloys for aircraft struc troscopy.Trans Nonferrous Met Soc China.2004.14(4):742 ture.Adv Mater Proc.2002(12):27 [7]Nakai M.Eto T.New aspects of development of high strength a Exfoliation corrosion behavior of Al-Cu Mg alloys for aerospace applications YANG Sheng,YI Danqing),ZHONG Li2),YAO Sujuan.3),LIU Huiqun) 1)Materials Science and Engineering School.Central South University,Changsha 410083,China 2)Northeast Light Alloy Incorporated Company.Harbin 115001.China 3)Zhengzhou Research Institute of Chalco.Zhengghou 450041,China ABSTRACI The exfoliation corrosion susceptibility and electrochemical impedance spectroscopy (EIS)of Al Cu Mg alloys with different corrosive grades were studied to analyze the dy namic process of exfoliation corrosion by TEM and electrochemical.The results show that 2524T4 aluminum alloy is good in exfoliation corrosion property,Cu rich particles are the main influence factor of exfoliation corrosion behavior of the alloy,pitting corrosion occurs after 2d and light exfoliation corrosion can be found after 4d.Using EIS and equivalent circuit to analyze the corrosion dynamic process,the corrosion process includes formation of pitting corrosion,develop- ment of pitting corrosion,and formation of exfoliation corrosion.The interface reaction in the corrosion process contains dissolution of oxide film,formation,adsorption and exfoliation of surface corrosion products. KEY WORDS aluminum alloy;exfoliation corrosion:EIS;equivalent circuit高频容抗和中－低频感抗的分析发现腐蚀的界面 过程依次经历氧化膜的溶解、表面腐蚀产物的形成、 吸附及脱落一系列过程． 参 考 文 献 ［1］ Hoffman M EHoffman P C．Corrosion and fatigue research structural issues and relevance to naval aviation．Int J Fatigue 200123（1）：1 ［2］ 李劲风曹发和张昭等．铝合金剥蚀敏感性及其定量研究方 法．中国腐蚀与防护学报200424（1）：55 ［3］ Li DHu Y LGuo B L．Study on the evaluation of localized corrosion of 2024T3 aluminum alloy with EIS．Mater Sci Eng 2000A280：173 ［4］ 曹楚南．腐蚀电化学．北京：化学工业出版社1994：91 ［5］ Keddam Mkuntz CTakenouti H．Exfoliation corrosion of aluminum alloys examined by electrode impedance．Electrochem Acta1997（1）：87 ［6］ Cassada WLiu JTaley J．Aluminum alloys for aircraft structure．Adv Mater Proc2002（12）：27 ［7］ Nakai MEto T．New aspects of development of high strength aluminum alloys for aerospace applications．Mater Sci Eng A2000 （5）：62 ［8］ Starke E AJrStaleyt J T．Application of modern aluminum alloys to aircraft．Prog Aerosp Sci199632：131 ［9］ AST M．Standard test method for exfoliation corrosion susceptibility in2xxx and7xxx series aluminum alloys （EXCO test）．USA 1985 ［10］ Posada MMurr L ENiou C S．Exfoliation and related microstructures in 2024 aluminum body skins on aging aircraft． Mater Charact199738：259 ［11］ Conde Ade Damborenea J．Electrochemical modeling of exfoliation corrosion behavior of8090alloy．Electrochem Acta1998 43（8）：849 ［12］ Conde Ade Damborenea J．Evaluation of exfoliation susceptibility by means of the electrochemical impedance spectroscopy． Corros Sci200042：1363 ［13］ Cai CLi J FZheng Z Q．Exfoliation corrosion susceptibility of 8090AI－Li alloy examined by electrochemical in dance pectroscopy．Trans Nonferrous Met Soc China200414（4）：742 Exfoliation corrosion behavior of Al－Cu－Mg alloys for aerospace applications Y A NG Sheng 1）Y I Danqing 1）ZHONG L i 2）Y AO Sujuan 13）LIU Huiqun 1） 1） Materials Science and Engineering SchoolCentral South UniversityChangsha410083China 2） Northeast Light Alloy Incorporated CompanyHarbin115001China 3） Zhengzhou Research Institute of ChalcoZhengzhou450041China ABSTRACT The exfoliation corrosion susceptibility and electrochemical impedance spectroscopy （EIS） of Al－ Cu－Mg alloys with different corrosive grades were studied to analyze the dynamic process of exfoliation corrosion by TEM and electrochemical．The results show that 2524－T4aluminum alloy is good in exfoliation corrosion propertyCu－rich particles are the main influence factor of exfoliation corrosion behavior of the alloypitting corrosion occurs after2d and light exfoliation corrosion can be found after4d．Using EIS and equivalent circuit to analyze the corrosion dynamic processthe corrosion process includes formation of pitting corrosiondevelopment of pitting corrosionand formation of exfoliation corrosion．The interface reaction in the corrosion process contains dissolution of oxide filmformationadsorption and exfoliation of surface corrosion products． KEY WORDS aluminum alloy；exfoliation corrosion；EIS；equivalent circuit 第2期 杨 胜等： 航空 Al－Cu－Mg 合金剥落腐蚀行为 ·219·