【英文标准名称】:StandardGuideforSelectionofPorosityandGrossDefectTestsforElectrodepositsandRelatedMetallicCoatings
【原文标准名称】:电镀层和相关金属镀层孔隙率和总缺陷试验选择的标准指南
【标准号】:ASTMB765-2003(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【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】:B08.10
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:electrodeposits;grossdefect;mechanicaldamage;metalliccoatings;porosity;porositytesting;wear-through;Electrodepositedcoatings;Metalliccoatings;Porosity--electrodeposited/metalliccoatings;Substrates--coatingapplications;Substrates--metall
【摘要】:Porositytestsindicatethecompletenessofprotectionorcoverageofferedbythecoating.Whenagivencoatingisknowntobeprotectivewhenproperlydeposited,theporosityservesasameasureofthecontroloftheprocess.Theeffectsofsubstratefinishandpreparation,platingbath,coatingprocess,andhandling,mayallaffectthedegreeofimperfectionthatismeasured.Note18212;Thesubstrateexposedbytheporesmaybethebasismetal,anunderplate,orboth.Thetestsinthisguideinvolvecorrosionreactionsinwhichtheproductsdelineateporesincoatings.Sincethechemistryandpropertiesoftheseproductsmaynotresemblethosefoundinserviceenvironments,thesetestsarenotrecommendedforpredictionofproductperformanceunlesscorrelationisfirstestablishedwithserviceexperience.1.1Thisguidedescribessomeoftheavailablestandardmethodsforthedetection,identification,andmeasurementofporosityandgrossdefectsinelectrodepositedandrelatedmetalliccoatingsandprovidessomelaboratory-typeevaluationsandacceptances.SomeapplicationsofthetestmethodsaretabulatedinTable1andTable2.1.2Thisguidedoesnotapplytocoatingsthatareproducedbythermalspraying,ionbombardment,sputtering,andothersimilartechniqueswherethecoatingsareappliedintheformofdiscreteparticlesimpactingonthesubstrate.1.3Thisguidedoesnotapplytobeneficialorcontrolledporosity,suchasthatpresentinmicrodiscontinuouschromiumcoatings.1.4Porositytestresults(includingthoseforgrossdefects)occuraschemicalreactionendproducts.Someoccurinsitu,othersonpaper,orinagelcoating.Observationsaremadethatareconsistentwiththetestmethod,theitemsbeingtested,andtherequirementsofthepurchaser.Thesemaybevisualinspection(unaidedeye)orby10x00D7;magnification(microscope).Othermethodsmayinvolveenlargedphotographsorphotomicrographs.1.5Thetestmethodsareonlysummarized.Theindividualstandardsmustbereferredtofortheinstructionsonhowtoperformthetests.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:25_220_40
【页数】:4P.;A4
【正文语种】:英语