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【英文标准名称】:StandardPracticeforTestingWaterResistanceofCoatingsUsingControlledCondensation
【原文标准名称】:用受控冷凝法测试涂层耐水性的标准实施规程
【标准号】:ASTMD4585-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D01.27
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:涂层;冷凝;耐水解;涂漆;涂料;测试
【英文主题词】:adhesion;blistering;condensation;humidity;resistance-water;rust
【摘要】:Watercancausedegradationofcoatings,soknowledgeofhowacoatingresistswaterishelpfulinpredictingitsservicelife.Failureinacondensationtestmaybecausedbyanumberoffactorsincludingadeficiencyinthecoatingitself,contaminationofthesubstrate,orinadequatesurfacepreparation.Thetestisthereforeusefulforevaluatingcoatingsaloneorcompletecoatingsystems.Condensationtestsofcoatingsareusedforspecificationacceptance,qualitycontrol,andresearchanddevelopmentofcoatingsandsubstratetreatments.Thesetestsusuallyresultinapassorfaildeterminationbutthedegreeoffailurealsomaybemeasured.Acoatingsystemisconsideredtopassifthereisnoevidenceofwater-relatedfailureafteraspecifiedperiodoftime.Resultsobtainedfromtheuseofcondensationtestsinaccordancewiththispracticeshouldnotberepresentedasbeingequivalenttoaperiodofexposuretowaterinthenaturalenvironment,untilthedegreeofquantitativecorrelationhasbeenestablishedforthecoatingorcoatingsystem.Thetestisusuallyconductedonmetal,plastics,orwoodspecimenswiththecoatingfacingtheinsideofthechamber.However,itispossibletotesttheblisterresistanceofhousepaintsonwoodspecimensbymountingtheuncoatedwoodsurfacefacingtheinsideofthechamber.Thispracticecanbeusedforcorrosiontestsparticularlyifthespecimensareperiodicallydried.Whilecorrosionproductswilldrainintothewaterbath,theyarenotcarriedintothevaporthatcondensesonthetestspecimens.1.1Thispracticecoversbasicprinciplesandoperatingproceduresfortestingwaterresistanceofcoatingsusingcontrolledcondensation.Condensationisproducedbyexposingonesurfaceofacoatedspecimentoaheated,saturatedmixtureofairandwatervapor,whilethereversesideofthespecimenisexposedtothecoolingeffectofroomtemperatureair.ThispracticeisderivedfromresearchoftheClevelandSocietyforCoatingsTechnology.1.2Thispracticeislimitedtothemethodsofobtaining,measuring,andcontrollingconditionsandproceduresofcontrolledcondensationtests.Itdoesnotspecifyspecimenpreparation,specifictestconditions,orevaluationofresults.Note1-AlternativepracticesfortestingwaterresistanceofcoatingsincludePracticesD870,D1735,andD2247.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:87_040
【页数】:4P.;A4
【正文语种】: