Designation:C632−88(Reapproved2016)StandardTestMethodforReboilingTendencyofSheetSteelforPorcelainEnameling1ThisstandardisissuedunderthefixeddesignationC632;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONTheresultsofthistestindicatewhetherornotasheetsteelwillcausereboilingunderonegivensetofenamelingconditions,andenabletheenamelprocessortoestablishapossiblecauseofimperfectionsinthefinishedcoating.Thismaybeperformedinanylaboratoryequippedforporcelainenamel.Itdoesnotrequirefacilitiesformetalsurfacepreparation.1.Scope1.1Thistestmethodcoversthedeterminationofwhetherasheetsteelforporcelainenamelingwillreboilunderagivensetofworsecaseconditions.1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C286TerminologyRelatingtoPorcelainEnamelandCeramic-MetalSystems3.Terminology3.1Definitions:3.1.1groundcoat—aporcelainenamelapplieddirectlytothebasemetaltofunctionasanintermediatelayerbetweenthemetalandthecovercoat(seeTerminologyC286).3.1.2reboiling—gasevolutionoccurringandrecurringdur-ingrepeatedfiringofthegroundcoat,sometimesadefect(seeTerminologyC286).3.1.3slip(slurry)—asuspensionoffinelydividedmaterialinliquid(seeTerminologyC286).3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1quarterlines—imaginarylinesparalleltothedirectionofrollingpositionedatadistancefromthesheetmilledge,equaltoonequarterofthesheetwidth.4.SummaryofTestMethod4.1Bothsurfacesofsheetsteelsampleplatesaresubjectedtoacleaningtreatmentandarethenporcelainen...
