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应力作用下1420Al―Li合金的腐蚀行为研究
electrochemicalimpedancespectroscopy[,ugg boots uk,J]．TransNonferrousMetSocChina。2003，i3(2)：320-324．[-15]李劲风,cheap ugg boots，张昭，程英亮，等．AI-Li合金在EXCO溶液中腐蚀的电化学阻抗研究[J]．金属学报，2003，39(4)：426-430．[16]LIJin-feng，CHENWen-jing，ZHAOXu―shan·eta1．Corrosionbehaviorof2195and1420Al-Lialloysin3．5NaCIsolution[J]．TransactionsofNonferrousMetalsSocietyofChina,ugg boots sale，2006，i6(5)：ii7i-i177．r17]CONDEA。DAMBORENEAJ．Electrochemicalmodel―ingofexfoliationcorrosionbehaviorof8090alloy[J]．ElectrocimicaActa．1997，43(8)：849-860．r18]KEDDAMM，KUNTZC，TAKENOUTIH,ugg boots sale，eta1．Ex―foliationcorrosionofaluminumalloysexaminedbye―lectrodeimpedance[J]．ElectrochimicaActa，1997．42(7)：87-97．[19]LIUXiaodong，FRANKELGS，ZOOFANB，eta1．Effectofappliedtensilestressonintergranularcorro―sionofAA2024一T3[J]．CorrosionScience，2004，46：405―425．Corrosionbehaviorof1420A1一LialloyundertensilestressCHENWe州ing，LIJin-feng，ZHAOXu-shan，RENWen-da，ZHENGZi―qiao(SchoolofMaterialsScienceandEngineering。CentralSouthUniversity，Changsha410083，China)Abstract：Thecorrosionbehaviorof1420A1一Lialloyunderappliedtensilestressinneutral3．5％NaClso―lutionwasinvestigatedbypotentiodynamicpolarizationcurves．electrochemicalimpedancespectroscopy(EIS)andSEM．Itisfoundthatthecorrosionof1420alloyisgreatlyaggravatedwithgrowingstress．Pit―tingcorrosionisdominatingratherthanintergranularcorrosion,ugg boots billig，forthat8(A13Li)asanodeisthemainagestrengtheningphaseevenlyprecipitatedinthematrix，whilefewS(A12MgLi)layonthegrainboundary．Keywords：142OA1一Lialloy；potentiodynamicpolarization；electrochemicalimpedancespectroscopy；con―stanttenSi1estress
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