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1、J.PRZONDZIONO,W.WALKE,E.HADASIK,J.SZALA,J.WIECZOREKISSN0543-5846METABK52(2)243-246(2013)UDC–UDK669.721:620.193=111CORROSIONRESISTANCETESTSOFMAGNESIUMALLOYWE43AFTEREXTRUSIONReceived–Prispjelo:2012-06-04Accepted–Prihvaćeno:2012-10-11PreliminaryNote–PrethodnopriopćenjeThepurposeofthestudywastoeva
2、luateresistancetoelectrochemicalcorrosionofmagnesiumalloyWE43afterplasticworking.Potentiodynamicandimmersioncorrosiontestswereperformedinsolutionswithconcentrationof0,01–2MNaCl.ThetestsofmicrostructureofmagnesiumalloyafteritsexposureinNaClsolutionswereperformedwithapplicationofscanningmicrosco
3、pe.Theresultsofmeasurementsofalloysurfacetopographyweregiven,whichwereobtainedbymeansofopticalprofilemeasurementgauge.Theresultsofcarriedouttestsproveexplic-itlythatcorrosionpropertiesofextrudedmagnesiumalloyWE43deterioratewiththeincreaseofmolarconcentra-tionofNaClsolution.Itwasprovedthatirres
4、pectiveoftheconcentrationofthesolution,WE43alloyfeaturespittingcorrosion.Itindicatesthenecessitytoapplyprotectivelayersonthepartsmadeofthetestedalloy.Keywords:magnesiumalloyWE43afterextrusion,electrochemicalcorrosion,potentiodynamicandimmersiontests,SEM,surfacetopographyINTRODUCTIONchlorideion
5、sfrom0,01–2MNaCl.Potentiodynamictestsenabledtoregisteranodicpolarisationcurves.Im-Magnesiumalloys,dependingonchemicalcompo-mersiontestswereperformedthatlasted1–5days.Hi-sitionandformability,canundergohotformingbytachiscanningelectronmicroscopewithfieldemissionmeansofthefollowingmethods:rolling,
6、opendieforg-FESEMS-4200enabledtomakeanalysisofchemicalingandstamping,extrusionforgingandsheetpresscompositioninmicro-areas.Surfacetopographyofal-forming.ExtrusionisoneofbasicmethodsofshapingloyWE43wasmeasuredbymeansofoptical.magnesiumalloys,whichenablestoproducelongpro-fileswithuniformcross-sec
7、tion.Concurrentextrusionandbackwardextrusionarebothapplied.ApartfromMATERIALANDMETHODSmatrixpreparationandgreasing,mainparametersde-Asstockmaterialforthetests,samplesofmagnesi-terminingtheprocessofextrusioninclude:temperature,umalloyWE4
