Designation:D6665−09(Reapproved2014)StandardPracticeforEvaluationofAgingResistanceofPre-stressedPrepaintedMetalinaBoilingWaterTest1ThisstandardisissuedunderthefixeddesignationD6665;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecanbeusedtoevaluatetheresistanceofapre-stressedprepaintedmetalpaneltocrackingandlossofadhesion,orboth,afteracceleratedagingbyboilingwater.Mostcoilcoatedproductsareformedandbentintospecificshapestoproduceafinalproduct.Theseoperationsintroducestresses,whichmayberelievedbycrackingofthecoatingafteraging.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D2794TestMethodforResistanceofOrganicCoatingstotheEffectsofRapidDeformation(Impact)D4145TestMethodforCoatingFlexibilityofPrepaintedSheetE643TestMethodforBallPunchDeformationofMetallicSheetMaterial3.Apparatus3.1Boilingwaterbathbigenoughtoholdformedtestspecimens.3.210×magnifier(optional).3.3Scotch#610adhesivetapeorequivalent.4.Reagents4.1Deionizedorotherwater,asagreeduponbycustomerandvendor.5.TestSpecimen5.1Bumped,bent,drawnorotherwisedeformedsamples,tobeagreeduponbetweencustomerandvendor.TheseshouldbepreparedaccordingtoTestMethodsD2794,D4145,E643,and/orpreparedinamanneragreeduponbycustomerandvendor.6.Procedure6.1Examinethetestspecimensforcracking,floweringandtapepick-off(adhesionloss),andrecordtheresults.6.2Placetheformedtestspecimensintheboilingwaterbathforone(1)min.Differenttimesmaybeusedifagreeduponbycustomerandvendor.6.3Removethetestspecimensandallowthemtoairdryandcooltoroomtemperature.6.4Inspectthetestspecimensforcracking,floweringanda...
