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1、WORLDWIDETestMethodENGINEERINGGMW14333MaterialsSTANDARDSResistancetoFuelsofExteriorAutomotiveMaterialsandComponentspreparationshallbesuitablemasked(bytheuseof1Scopetapeetc.)priortotesting.Theobjectofthistestprocedureistodetermine4.2Organiccoatings.Foror
2、ganiccoatings,theeffectsoffuelsonexteriorautomotivematerialsspeciallypreparedtestpanelscanbeused.Theandcomponents.testpanelsshallbe250±5mmx20±2mmx1±0.5mmandshouldbemadefromsheetsteelNote:Nothinginthespecificationsupersedesrepresentativeofproductioninten
3、t.Thequalityofapplicablelawsandregulationsunlessspecifictheorganiccoatinganditsprocedureofapplicationexemptionhasbeenobtained.shallbeaspercurrentfinalfinishproceduresNote:IntheeventofconflictbetweentheEnglishappropriatetotheenvisagedapplicationoftheandd
4、omesticlanguage,theEnglishlanguageshallmaterialundertest.Theorganiccoatingshallbeintakeprecedence.accordancetotherelevantmaterialspecification.4.3SelfAdhesiveFilms.Forselfadhesivefilms,2Referencesthefilmshallbeapplied,asperproductionNote:Onlythelatestap
5、provedstandardsareprocedurestoproductionintentsurfacespreparedapplicableunlessotherwisespecified.asperparagraph5.2unlessotherwisepreviously2.1ExternalStandards/Specifications.agreed.4.4NumberofTestPieces.Aminimumof3testNonepiecesshallbetested.2.2GMStand
6、ards/Specifications.Note:SamplesshallbefreefromvisualdefectsGMEL0001GMW14829whichcouldaddtotheseverityofthetest.GMW3221GMW149145TestMethod3TestEquipment5.1SummaryofTestMethod.Usingthismethod,3.1Apparatusforconditioningaccordingtoresistanceofsamplepartst
7、oautomotivefuelsisGMW3221.determinedbyevaluationafterrepeatedshort3.2Stopwatchwith0.1sdivisions.immersions.Forpaintedparts,samplesshallbescribedwithasharpknife.Thescribepatternshall3.3Suitableglassbeakerstoallowimmersionofbetwoseriesof9parallelllinesint
8、ersectingatan--`,,```,,,,````-`-`,,`,,`,`,,`---sample.angleof90º.Thedistancebetweenthelinesshall3.4Sharpknife.be3to4mmseeFigure1.3.5Testfuels:GMW14914(84.5vol%compositiondescribedinGMEL0001with15vol%Methanol,0.5vol%waterand20ppmf
