【astm標準】b 912 - 02 (2013)

1、Designation:B912?02(Reapproved2013)StardSpecificationfPassivationofStainlessSteelsUsingElectropolishing1ThisstardisissuedunderthefixeddesignationB912thenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladop

2、tioninthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thisspecificationcoversthepassivationofsta

3、inlesssteelalloysinthe200(UNS2XXXX)300(UNS3XXXX)400(UNS4XXXX)seriestheprecipitationhardenedalloysusingelectropolishingprocedures.NOTE1—Surfacepassivationoccurssimultaneouslywithelectropolishingunderproperoperatingconditi

4、ons.Thequalityofpassivationwilldependonthetypeofstainlesssteelthefmulationoftheelectropolishingsolutiontheconditionsofoperation.Freeirononthesurfaceofthestainlesssteelisremovedresultinginimprovedcrosionresistance.Surface

5、smoothingobtainedbyelectropolishingwillalsoimprovecrosionresistance.Electropolishingwillalsoremoveheattintoxidescale.1.2ThevaluesstatedinSIunitsaretoberegardedasstard.Nootherunitsofmeasurementareincludedinthisstard.1.3Th

6、isspecificationmayinvolvehazardousmaterialsoperationsequipment.Thisspecificationdoesnotpurpttoaddressallofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhe

7、althpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDocuments2.1ASTMStards:2A380PracticefCleaningDescalingPassivationofStainlessSteelPartsEquipmentSystemsA967SpecificationfChemicalPassivationT

8、reatmentsfStainlessSteelPartsB117PracticefOperatingSaltSpray(Fog)ApparatusB322GuidefCleaningMetalsPritoElectroplatingB374TerminologyRelatingtoElectroplatingB602TestMethodfAttributeSamplingofMetallicInganicCoatingsD3951Pr

9、acticefCommercialPackaging2.2ISOStards:3ISO2080ElectroplatingRelatedProcesses—VocabularyISO4519ElectrodepositedMetallicCoatingsRelatedFinishes—SamplingProceduresfInspectionbyAttributesISO9227CrosionTestsinArtificialAtmos

10、pheres—SaltSprayTestsISO15730MetallicOtherInganicCoatings—ElectropolishingasaMeansofSmoothingPassivatingStainlessSteels3.Terminology3.1Definitions:3.1.1electropolishingn—electrochemicalprocessinwhichthearticle(s)tobepass

11、ivatedaretreatedanodicallyinasuitableacidmedium.3.1.2passivationn—renderingofastainlesssteelsurfaceintoalowerstateofchemicalreactivity.3.1.2.1Discussion—PassivatedsurfacesareacterizedbytheabsenceoffreeironasdefinedbyPrac

12、ticeA380.3.2DefinitionsofTermsSpecifictoThisStard:3.2.1DefinitionsoftermsinthisspecificationcanbefoundinTerminologyB374ISO2080.4.deringInfmation4.1Whenderingarticlestobeelectropolishedinconfmancewiththisstardthepurchaser

13、shallstatethefollowing:4.1.1AlloyDesignation—WhenderingarticlespassivatedinaccdancewiththisspecificationthepurchasershallstateinadditiontotheASTMdesignationnumberthedateofissuethealloydesignationnumberthetestingmethod(s)

14、bywhichthearticlewillbeevaluated(see5.3).4.1.2Appearance—Thepurchasershallspecifytheappearancerequiredfexamplebrightdull.Unlessotherwisespecifiedbythepurchaserabrightlustershallbeacceptable.Alternativelysamplesshowingthe

15、requiredfinishrangeoffinishshallbesuppliedapprovedbythepurchaser.When1ThisspecificationisunderthejurisdictionofASTMCommitteeB08onMetallicInganicCoatingsisthedirectresponsibilityofSubcommitteeB08.07onConversionCoatings.Cu

16、rrenteditionapprovedMay12013.PublishedMay2013.iginallyapprovedin2002.Lastpreviouseditionapprovedin2008asB912–02(2008)ε1.DOI:10.1520B091202R13.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServicea

17、t.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.3AvailablefromAmericanNationalStardsInstitute(ANSI)25W.43rdSt.4thFloNewYkNY10036:www.ansi.g.Copyright?ASTMInternational100BarrH

18、arbDrivePOBoxC700WestConshohockenPA194282959.UnitedStates1destructivewhicharenondestructive.Insomeinstancesbothdestructivenondestructivetestmethodsmayexistfthetestingoftheconfmanceofafinishtoaparticularrequirement.Thepur

19、chasershouldstatewhichistobeused.7.3Aninspectionlotshallbedefinedasacollectionofarticlesthatareofthesamekindthathavebeenproducedtothesamespecificationsthathavebeenfinishedbyasinglesupplieratonetimeatapproximatelythesamet

20、imeunderessentiallyidenticalconditionsthataresubmittedfacceptancerejectionasagroup.7.4Ifseparatetestspecimensareusedtorepresentthearticlesinatestthespecimensshallbeofthenaturesizenumberbeprocessedasrequiredinthetestmetho

21、dsofthisspecification.Unlessaneedcanbedemonstratedseparatelypreparedspecimensshallnotbeusedinplaceofproductionarticlesfnondestructivetestsvisualexamination.Fdestructivetestsseparatelypreparedspecimensmaybeused.8.Rejectio

22、nRehearing8.1Partsthatfailtoconfmtotherequirementsofthisspecificationmayberejected.Rejectionshouldbereptedtotheproducersupplierpromptlyinwriting.Incaseofdissatisfactionwithtestresultstheproducersuppliermaymakeaclaimfareh

23、earing.9.Certification9.1Whenspecifiedinthepurchasedercontractthepurchasershallbefurnishedcertificationthatsamplesrepresentingeachlothavebeeneithertestedinspectedasdirectedinthisspecificationtherequirementshavebeenmet.Wh

24、enspecifiedinthepurchasedercontractareptofthetestresultsshallbefurnished.10.Packaging10.1IfpackagingrequirementsarenecessaryunderthisspecificationtheyshallbeinaccdancewithPracticeD3951.11.TestRept11.1Thetestreptshallincl

25、udethefollowinginfmation:11.1.1Areferencetothisstard11.1.2Areferencetothetestmethod(s)used(see5.3.1)11.1.3Thelocation(s)ofthetestarea(s)oneachspecimen11.1.4Thequantityofspecimenstested11.1.5Thenameoftheoperatthetestingla

26、baty11.1.6Thedateonwhichthetest(s)was(were)perfmed11.1.7Anycircumstancesconditionsthoughtlikelytoaffecttheresultstheirvalidity11.1.8Anydeviationfromthetestmethodspecified11.1.9Theresult(s)ofthetest(s)(seeSection6).12.Key

27、wds12.1electropolishingpassivationstainlesssteelAPPENDIXES(NonmatyInfmation)X1.TYPICALELECTROPOLISHINGSOLUTIONX1.1ElectropolishingMaterials:Sulfuricacid96%w50%vvthophosphicacid85%w50%vvCurrentdensity15ampdm2minimumTemper

28、ature75CTimetypical2to4minCathodesstainlesssteelcopperleadX2.COPPERSULFATETEST(FFREEIRON)X2.1Materials—Coppersulfatetestsolution:Distilledwater100mLSulfuricacid96%w0.4mLCoppersulfateACS(CuSO45H2O)1.6g(dissolveallingredie

29、nts)X2.2Procedure—Usingacottonswabapplythetestsolutiontoacleanareaofthepassivatedsurfacetobetestedkeepingthesurfacewetfaperiodof6min.Thefmationofacoppercoleddepositcoppercoledspotsbothindicatesfailure.Partsusedftestingsh