ASTM-D714-02(2009)-Standard-Test-Method-for-Evalua

Designation:D714–02(Reapproved2009)StandardTestMethodforEvaluatingDegreeofBlisteringofPaints1ThisstandardisissuedunderthefixeddesignationD714;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thistestmethodemploysphotographicreferencestan-dardstoevaluatethedegreeofblisteringthatmaydevelopwhenpaintsystemsaresubjectedtoconditionswhichwillcauseblistering.Whileprimarilyintendedforuseonmetalandothernonporoussurfaces,thistestmethodmaybeusedtoevaluateblistersonporoussurfaces,suchaswood,ifthesizeofblistersfallswithinthescopeofthesereferencestandards.Whenthereferencestandardsareusedasaspecificationofperformance,thepermissibledegreeofblisteringofthepaintsystemshallbeagreeduponbythepurchaserandtheseller.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMAdjuncts:ReferenceStandardsforBlisteringofPaintCoatings23.SignificanceandUse3.1Aphenomenonpeculiartopaintedsurfacesistheformationofblistersrelativetosomesystemweakness.Thistestmethodprovidesastandardprocedureofdescribingthesizeanddensityoftheblisterssothatcomparisonsofseveritycanbemade.4.ReferenceStandards4.1Thephotographicreferencestandardsareglossyprints.2Figs.1-4arereproductionsofthesestandardsandareincludedtoillustratetwocharacteristicsofblistering:sizeandfre-quency.4.2Size—Referencestandardshavebeenselectedforfourstepsastosizeonanumericalscalefrom10to0,inwhichNo.10representsnoblistering.BlisteringstandardNo.8representsthesmallestsizeblistereasilyseenbytheunaidedeye.BlisteringstandardsNos.6,4,and2representprogressivelylargersizes.4.3Frequency—Referencestandardshavebeenselectedforfourstepsinfrequencyateachstepinsize,designatedasfollows:Dense,D,Mediumdense,MD,Medium,M,andFew,F.NOTE1—Aquantitativephysicaldescriptionofblisteringwouldin-cludethefollowingcharacteristicsdeterminedbyactualcount:Sizedistributionintermsofmensurationunits,Frequencyofoccurrenceperunitarea,Patternofdistributionoverthesurface,andShapeofblisterFortheusualtests,anactualcountismoreelaboratethanisnecessary.5.Procedure5.1Subjectthepaintfilmtothetestconditionsagreeduponbythepurchaserandtheseller.ThenevaluatethepaintfilmforthedegreeofblisteringbycomparisonwiththephotographicreferencestandardsinFigs.1-4.6.Report6.1Reportblisteringasanumber(Note2)designatingthesizeoftheblistersandaqualitativetermorsymbolindicatingthefrequency.6.2Intermediatestepsinsizeorfrequencyofblistersmaybejudgedbyinterpolation.6.3Whenthedistributionofblistersovertheareahasanonuniformpattern,useanadditionalphrasetodescribethedistribution,suchas“smallclusters,”or“largepatches.”NOTE2—Thenumberreferstothelargestsizeblisterthatisnumerousenoughtoberepresentativeofthespecimen.Forexample,photographicstandardNo.4,“Dense,”hasblistersranginginsizefromaboutNo.7toNo.4,inclusive.1ThistestmethodisunderthejurisdictionofASTMCommitteeD01onPaintandRelatedCoatings,Materials,andApplicationsandisthedirectresponsibilityofSubcommitteeD01.25onEvaluationofWeatheringEffects.CurrenteditionapprovedJuly1,2009.PublishedJuly2009.Originallyapprovedin1943.Lastpreviouseditionapprovedin2002asD714–02´1.2GlossyprintsofthephotographicreferencestandardsshowingtypesofblisteringareavailablefromASTMInternationalHeadquarters.OrderAdjunctNo.ADJD0714.Originaladjunctproducedin1986.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.6.4ThepictorialrepresentationsinthisstandardwhicharepublishedintheBookofStandardsaresufficientinordertoconducttheevaluation.Itispreferablehowever,tousetheoriginalphotographsordrawingswhenavailable.7.Keywords7.1blistering;corrosion;evaluations;referencestandardsFewMediumFIG.1BlisterSizeNo.2MediumDenseDenseFIG.1(continued)D714–02(2009)2FewMediumFIG.2BlisterSizeNo.4DenseDenseFIG.2(continued)D714–02(2009)3FewMediumFIG.3BlisterSizeNo.6MediumDenseDenseFIG.3(continued)D714–02(2009)4MediumDenseDenseFIG.4(continued)FewMediumFIG.4BlistersizeNo.8D714–02(2009)5ASTMInternationaltakesnopositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemmentionedinthisstandard.Usersofthisstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,areentirelytheirownresponsibility.Thisstandardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteeandmustbereviewedeveryfiveyearsandifnotrevised,eitherreapprovedorwithdrawn.YourcommentsareinvitedeitherforrevisionofthisstandardorforadditionalstandardsandshouldbeaddressedtoASTMInternationalHeadquarters.Yourcommentswillreceivecarefulconsiderationatameetingoftheresponsibletechnicalcommittee,whichyoumayattend.Ifyoufeelt