uscar-1revision1v002

SALTSPRAYTESTINGANDEVALUATIONOFFASTENERFINISHESTheresearchdata,analysis,conclusion,opinionsandothercontentsofthisdocumentaresolelytheproductoftheauthors.NeithertheSocietyofAutomotiveEngineers,Inc.(SAE)northeUnitedStatesCouncilforAutomotiveResearch(USCAR)certifiesthecomplianceofanyproductswiththerequirementsofnormakesanyrepresentationsastotheaccuracyofthecontentsofthisdocumentnortoitsapplicabilityforpurpose.Itisthesoleresponsibilityoftheuserofthisdocumenttodeterminewhetherornotitisapplicablefortheirpurposes.Copyright2005,USCARAllrightsreserved.PrintedinU.S.A.IssuedDecember1996RevisedMarch2005SAE/USCAR-1Revision1QUESTIONSREGARDINGTHISDOCUMENT:(724)772-8518FAX(724)776-3036TOPLACEADOCUMENTORDER:(724)776-4970FAX(724)776-07901.SCOPE:Thisprocedureisusedtotestandevaluatetheresistanceoffastenersurfacefinishestolaboratorysaltspraytesting.2.REFERENCES:2.1ASTMPublications:AvailablefromASTM,100BarrHarborDrive,WestConshohocken,PA19428-2959.ASTMB117ASTMD6103.APPARATUS:3.1SaltSprayCabinet:ThesaltspraycabinetandoperatingconditionsshallmeettherequirementsofASTMB117exceptasnotedherein.3.2SampleHolders:Sampleholdersshallbemadeofaninertcorrosionresistantmaterialsuchasacrylic,polyvinylchlorideorsimilarmaterial.Theholdersizeandthicknessdependsuponthesizeandnumberoffastenersbeingtested.Nowoodshallbeusedintheconstructionofsampleholdersasthesapaciditycanaffectthecorrosionresult.SAE/USCAR-1Revision1March2005SALTSPRAYTESTINGANDEVALUATIONOFFASTENERFINISHES-2-4.TESTPROCEDURE:4.1SamplePreparation:Allsamplestobetestedshallhavebeenproperlypreparedbytheusualmanufacturingprocessrequiredforthatparticularfinish.Priortosaltspraytesting,thepartsshallbewashedinamildnoncorrosive,phosphate-freedetergentsolution(approximately20mLdetergentto15Lofwater)at21°C±3°Cfor10to15s,rinsedintapwaterandthenblowndrywithcompressedair.ThedetergentshallhaveapHof8.2to9.2(LiquiNoxDetergent,FisherCatalogitem04-322-15Borequivalent).4.2SampleAssembly:AssemblesamplestoaSampleHolderdesignedfortheconfigurationofthefastener.4.2.1ExternalThreadedFasteners:FastenersshallbemountedonthesampleholdersuchthatthetestsolutionwillnotdripontofastenersbelowwhenthesampleispositionedasshowninFigure1.4.2.2InternalThreadedandOtherTypesofFasteners:Forsamplessuchasnuts,washers,andclips,placethesamplesonaglassorplasticrodorhangbynylonthreadofsuitablelengthtoholdpartswithoutcontactingeachother.Therodsornylonthreadshallthenbesupportedinthecabinetsuchthatthesolutionwillnotdripfromonesampleontoanother.4.3SamplePosition:Placetheholderandsamplesinthesaltspraycabinetwiththeprimaryaxisoftheholderat25°±3°fromthevertical.SAE/USCAR-1Revision1March2005SALTSPRAYTESTINGANDEVALUATIONOFFASTENERFINISHES-3-FIGURE1-SamplePosition4.4FinalPreparation:Attheendofthespecifiedtesttime,removethesamplesfromthecabinet,rinseincleanrunningwaternotwarmerthan38°Ctoremovesaltdepositsfromthesurfaceandthenblowdrywithcompressedair.5.EVALUATION:Nonthreadedsurfacesaretobeevaluatedandshallmeetthefollowingrequirementsafterthespecifiedtesttime.5.1WhiteCorrosion(UsuallyPresentwithFinishesContainingZinc):a.Thecoatingshallshownoevidenceofblistering,peeling,orlossofadhesion.b.Nospecimenshallexhibitwhitecorrosionexceeding1%perASTMD610,grade6.5.2FerrousCorrosion(BaseMetal):a.Thecoatingshallshownoevidenceofblistering,peeling,orlossofadhesion.b.Nospecimenshallexhibitaferrouscorrosionspotlargerthan1.5mmindiameter.c.Nospecimenshallexhibitferrouscorrosionexceeding0.1%perASTMD610,grade8.SAE/USCAR-1Revision1March2005SALTSPRAYTESTINGANDEVALUATIONOFFASTENERFINISHES-4-6.KEYWORDS:Fastener,salt,finishesPREPAREDBYTHEUSCARFASTENERTECHNICALCOMMITTEE