【英文标准名称】:StandardPracticeforTestingWaterResistanceofCoatingsUsingWaterImmersion
【原文标准名称】:水浸渍法测试涂层的耐水性能的标准实施规程
【标准号】:ASTMD870-2002
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:耐水解;试验;覆层
【英文主题词】:adhesion;blistering;immersion;resistance-water;rust
【摘要】:Immersioninwatercancausethedegradationofcoatings.Knowledgeonhowacoatingresistswaterimmersionishelpfulinpredictingitsservicelife.Failureinawaterimmersiontestmaybecausedbyanumberoffactorsincludingadeficiencyinthecoatingitself,contaminationofthesubstrate,orinadequatesurfacepreparation.Thetestisthereforeusefulforevaluatingcoatingsaloneorcompletecoatingsystems.Waterimmersiontestsareusedforresearchanddevelopmentofcoatingsandsubstratetreatments,specificationacceptance,andqualitycontrolinmanufacturing.Theseteststypicallyresultinapassorfaildetermination,butthedegreeoffailuremayalsobemeasured.Acoatingsystemisconsideredtopassifthereisnoevidenceofwater-relatedfailureafteraspecifiedperiodoftime.Resultsobtainedfromwaterimmersiontestsinaccordancewiththispracticeshouldnotberepresentedasbeingequivalenttoaperiodofexposuretowaterinthenaturalenvironment,untilthedegreeofquantitativecorrelationhasbeenestablishedforthecoatingorcoatingsystem.Corrosiontestsofascribedcoatingonaferroussubstrateareimpracticalinwaterimmersiontestsasthecorrosionproductstendtocontaminatethewaterbath.Continuousoverflowofthetesttankissometimesrequiredtomaintainconsistentwaterquality.Theapparatusforthetestisrelativelyinexpensiveandcanbeassimpleasaglassbeakerwithastirrer.Itisalsopossibletouseverylargetanksfortestingcoatedpipeorotherlargecoatedproducts.1.1Thispracticecoversthebasicprinciplesandoperatingproceduresfortestingwaterresistanceofcoatingsbythepartialorcompleteimmersionofcoatedspecimensindistilledorde-mineralizedwateratambientorelevatedtemperatures.Althoughtheapparatusandprocedurecouldbeemployedinimmersiontestsusingsolutionsofvariousmaterialsinwater,thispracticeislimitedtotestsinwateralone.1.2Thispracticeislimitedtothemethodsofobtaining,measuring,andcontrollingtheconditionsandproceduresofwaterimmersiontests.Itdoesnotspecifyspecimenpreparation,specifictestconditions,orevaluationofresults.Note18212;AlternativepracticesfortestingthewaterresistanceofcoatingsincludePracticesD1735,D2247,andD4585.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:25_220_20
【页数】:3P.;A4
【正文语种】: