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1、WORLDWIDETestMethodENGINEERINGGMW14700MaterialsSTANDARDSStoneImpactResistanceofCoatingsItisimportanttoremovethesmallpiecesbefore1Scopereusingthegravel.(GravelmeetingthesespecificationscanbeobtainedfromtheQ-PanelNote:NothinginthespecificationsupersedesCol.800CanterburyRd.,Cleveland,OH44145.);applicab
2、lelawsandregulationsunlessspecificGermanrepresentation:PauschMeßtechnikexemptionhasbeenobtained.GmbH,Nordstraße32,42781Haan).Note:IntheeventofconflictbetweentheEnglish3.3MaskingTape.TESA4651orequivalent(GMEanddomesticlanguage,theEnglishlanguageshalltakeprecedence.partnumber9274043).--``,,`,`,,```,`,
3、,``,`,-`-`,,`,,`,`,,`---3.4TestMethods.Thisstandarddescribesthetestprocedurestoevaluatethestoneimpactresistanceofcoatings.3.4.1MethodA.AcoldroomorfreezerofMethodAisacontainedmethodwherethesufficientsizeinwhichthegravelometerandthegravelometeriscontainedinaconstanttestsamplescanbemaintainedat-18±2°Ct
4、emperaturefreezerandMethodBisthetransfer3.4.2MethodB.Afreezerinwhichthetestmethodwheretestpanelsaretransferredfromasamplescanbecooledtothetesttemperatureoffreezertothegravelometeratroomtemperature.-18±2°C.PreconditioningthatcausesfrostontheMethodCisacontainedmethodwherethesurfaceofthetestspecimensmu
5、stbeavoided.gravelometeriscontainedinaconstant3.4.3MethodC.Aroominwhichthegravelometertemperatureroom.andthetestsamplescanbemaintainedat22±5°C2ReferencesNote:Onlythelatestapprovedstandardsare4TestMaterialapplicableunlessotherwisespecified.Notapplicable.2.1ExternalStandards/Specifications.SAEJ4005Tes
6、tMethod2.2GMStandards/Specifications.5.1SummaryofTestMethod.Notapplicable.None5.2TestSamplePreparation.5.2.1Testsamplesshallbecutfrompartsthatare2.3AdditionalReferences.beingevaluatedwhensizeandgeometryofthePartnumber,GME:9274043partpermit.Whenthisisnotpossible,specialtestplaques(testpanelsof100x300
7、mmaremost3TestEquipmentsuitable)shallbepreparedusingthesame3.1Gravelometer.Agravelprojectingmachinesubstratematerial,substratethickness,surfaceconstructedaccordingtodesignspecificationpreparation(such
