不同热处理态2024铝合金的腐蚀行为

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1、Availableonlineatwww．sciencedirect．Gom一Transactionsof铀ScienceDirectNoHferrousMetalsSocietyofChinaELSEⅥERPressTrans．NonferrousMet．Soc．China23(2013)3215—3227wwW．tnmsc．cnCorrosionbehaviorof2024A1。——Cu。——MgalloyofvarioustempersK．S．GHOSH，Md．HILAL，SagnikBOSEDepartmentofMetallurgicalandMaterials

2、Engineering，NationalInstituteofTechnology,Durgapur一713209，IndiaReceived4February2013；accepted16May2013Abstract：Corrosionbehaviorof2024A卜Cu-Mgalloyofdiferenttemperswasassessedbypotentiodynamicpolafizationstudiesin3．5％NaClsolution．3．5％NaCl+1．0％H，0，solutionand3．5％NaClsolutionatDH12．Polarizat

3、ioncurvesshowedshiftingofcorrosionpotential(c0r)towardsmorenegativepotentialwithincreasingageingtimeandshiftingofc0rrinthepositivedirectionwiththeaddition0fH，O，inNaClsolution．Polarizationcurvesin3．5％NaClsolutionatpH12exhibiteddistinctpassivityphenomenon．Opticalmicrographsofthecorrodedsurf

4、acesshowedgenera1corrosion．extensivepittingandintergranularcorrosionaswel1．Cyclicpotentiodynamicpolarizationcurvesexhibitedwidehysteresisloopandthemodeofcorrosionattackconfirmedthatthealloystatesaresusceptibletopitgrowthdamage．Attemptsweremadetoexplaintheobservedcorrosionbehavioroftheallo

5、yofvarioustempersindifferentelectrolyteswiththehelpofmicrostructura1feamres．Keywords：2024A1一Cu-Mgalloy；ageingbehavior；electrochemicalpolarization；passivity；pitingpotentialmicroscaleS(A12CuMg)phase，nanoscaledispersoid1IntrOductiOn(A12oMn3Cu2)particlesalongwithasignificantamountofothermicro

6、scaleintermetallicparticlescontainingA1Precipitationhardeningaluminiumalloysof2xxxCu，Fe，andMn，suchas，0(A12Cu)，A13Fe，A13Mn，serieswithhighspecificstrength，goodfractureA17Cu2Fe，and(A1，Cu)6Mn，distributedthroughoutthetoughness，excellentfatiguepropertiesanddamagematrix『35,6]．Oftensomeofthesepar

7、ticlesareobservedtolerancehavebeenfoundimportantapplicationsinthetoclusterverycloselytogetherorevenfuse，aerospaceindustry．Incommercial2xxxseriesalloys，Cudemonstratingthehighlycomplexnatureofthe2024andMgarethemainalloyingelementswithsmallalloymicrostructure．amountofS