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1、CorrosionScience67(2013)82–90ContentslistsavailableatSciVerseScienceDirectCorrosionSciencejournalhomepage:www.elsevier.com/locate/corsciHybridepoxy–silanecoatingsforimprovedcorrosionprotectionofMgalloyFabiolaBrusciotti⇑,DaryaV.Snihirova,HuibinXue,M.FatimaMontemor,SvetlanaV
2、.Lamaka,MarioG.S.FerreiraInstitutoSuperiorTécnico,ICEMS,Av.RoviscoPais,1049-001Lisbon,PortugalarticleinfoabstractArticlehistory:Newhybridepoxy–silanecoatings,withaddedfunctionalitiesforimprovedperformanceanddurability,Received12May2012weredesignedtoincreasethecorrosionprot
3、ectionofmagnesiumalloys.ThecorrosionbehavioroftheAccepted13October2012coatedAZ31wasstudiedthroughelectrochemicalimpedancespectroscopy(EIS)in0.05MNaCl.TheAvailableonline24October2012morphologyandsurfacechemistryofthesampleswerealsoinvestigatedthroughscanningelectronmicrosco
4、py(SEM)andFouriertransforminfraredspectroscopy(FT-IR)beforeandafterimmersioninKeywords:theelectrolyte.ThenewhybridsilanecoatingsshowedahighresistancetocorrosionthatpersistedA.Magnesiumthroughoutone-monthimmersioninapH-neutralNaClsolution.A.AlloyÓ2012ElsevierLtd.Allrightsre
5、served.A.OrganiccoatingsB.EIS1.IntroductionInthisperspective,sol–gelbasedsilaneshaveattractedsignifi-cantinterestasversatilecoatings,easytoprocessandapply,withMagnesiumalloysarecharacterizedbyauniquesetofproper-potentialtoreplacechromate-basedcorrosionprotectionsurfaceties(
6、lightweight,highthermalconductivity,dimensionalstabilitytreatmentsforMgalloys,asstatedinsomeofthemostrelevantanddampingcharacteristics,recyclability,...)[1–5],whichmakeworkonthematter[10–22].Theperformanceofsuchsurfacethemvaluablematerialsformanyindustrialapplications,such
7、astreatmentsismostlydependantontheirabilitytoformadenseautomotiveandaerospacecomponents,sportinggoods,electronicsbarrieragainstthepenetrationofwaterandcorrosionprecursors,andbio-compatibleimplants.andontheiradhesivebondstrengthtothesubstrate,whichcanInaeronauticstheuseofma
8、gnesiumalloysisparticularlygrow-beachievedthroughintroductionofvariousorgano-functionalin
