1、INTERNATIONA1.STANDARDISO4212editionFirst2O23-O2Corrosionofmeta1.sanda1.1.oys一Methodofoxa1.icacidetchingtestforintergranu1.arcorrosionofausteniticstain1.essstee1.Corrosiondesmetauxeta1.1.iagesMethodedessaidegravureaIacideoxa1.iquepour1.acorrosionIntergranu1.airedeacierInoxydab1.eaustnitiqueCOPYRIGHT
2、PROTECTEDDOCUMENTISO2023IUirhM*hedbdi1.iUedotherwiseupdhi.o啪InyM1.tta0DmkfifiU81.andonnet8CH-1214Vernier,GenevaPhone：M1.227490111觥ftte:丽丽BQrgPub1.ishedinSwitzer1.andContentsPageForewordItroductionNormativereferencesTermsanddefinitionsGenera1.princip1.esApparatusSensitizationheattreatmentfortestspeci
3、mensTestspecimensTestso1.utionTestprocedureEva1.uationofetchingstructureTestreportBib1.iography.ForewordISO(theInternationa1.OrganizationforStandardization)isawor1.dwidefederationofnationa1.standardstdiugh(ISOtBrhnkoibMri*Ri)tSis(vcekuWPWf1.pbringbodyIittnif1.Mii6tanbjkifntwrhhvar!tedmitteehasbeenes
4、tab1.ishedhastherighttoberepresentedonthatcommittee.Internationa1.organizations,governmenta1.andnon-governmenta1.,in1.iaisonwithISO.a1.sotakepartinthework.ISOco1.1.aboratesc1.ose1.ywiththee1.ectrotechnica1.standardization.Internationa1.E1.ectrotechnica1.Commission(IEC)ona1.1.mattersofTheproceduresus
5、edtodeve1.opthisdocumentandthoseintendedforitsfurthermaintenanceare。智SFR幽of1.SO1.EC(VifY1.的M51btheeditoria1.ru1.esoftheISO/IECDirectives.Part2(seewww.iso.org/direc1.ives).R褥衲Onrigbtsd随秘姐n棍蜘琳蛾ns由能献11三冲撤利版府doc1.三棉犯鼠跟监ssubjectofanypatentrightsidentifiedduringthedeve1.opmen)/do向U1.beintheIntroductionand
6、/orontheISO1.istofpatentdec1.arationsreceived(seewww.iso.org/patents).Anytradeusedinthisconstitutenameendorsement.documentisinformationgivenfortheconvenienceofusersanddoesnotForanexp1.anationofthevo1.untarynatureofstandards,themeaningofISOspecifictermsand觐牌R涸现dOwarWMWO)assE麻ftinwe植5i盛,nBaNW现Jdea樵es做
7、vvw.iso.orgiso/forewod.htmI.ThisdocumentwaspreparedbyTechnica1.CommitteeISO/TC156,Corrosionofmeta1.sanda1.1.oys.AnyfeedbackorquestionsonthisdocumentShCY1.dhS1.hUM1.rnationa1.standardsbody.Acomp1.ete1.istingofthesebodiescanbefoundatwww.iso.org/members.htm1.Introductionofchromium-richattributab1.etoca
8、rbidesboundaryitsegregationcontinuousprecipitates.dep1.etionformationstain1.essG0571:2003andISO3651-1,A262-15PracticeandA)cannoteva1.uatesensitization,howeverretchingthemse1.ves.thechromium-richsuspected,IGCprecipitatessu1.fate-su1.furicacidgrainboundarycarbidesdocumentbenefitsonG0571:2003.etchingte
9、stsarethattheyaresimp1.e,easyandrapid.This23-A1.1.rightsreservedIntergranu1.arcorrosion(IGC)isaformof1.oca1.izedcorrosionwhichoccursa1.onggrainboundaries.IGCstain1.essstee1.Isgrainboundarygrainoccurs,1.eadsandChromiumWhentheadjacenttothegrainboundary,andIGCoccursincertaincorrosivemedia.Thisprocessis
10、usua1.1.yknownassensitization.Sensitizationofstain1.essstee1.canbeeva1.uatedbyISOIGCtestsforaustenitic(JISstee1.s：suchasASTMISO3651-2rISO12732.Ontheotherhand,oxa1.ictheycaneva1.uatenon-sensitizedconditionOfausteniticstain1.essstee1.sandsuspicionsofsensitizationbyobservingtheetchedsurfaceofthestain1.
11、essstee1.s.Thisisbecauseitdoesnotetchchromiumdep1.etionadjacenttoIfsensitizationisgrainboundarytests,ferricbutchromium-richtest(seeISO3651-2)1.65%nitricaddtest(seeISO36511),coppersu1.fate-su1.furicacidtest(seeISO3651-2)orEPR1.est(ISO12732)shou1.dbeconductedtoeva1.uatesensitizationofausteniticstain1.
12、essstee1.s.ThemainbasedOfJIStheseoxa1.icaddCorrosionofmeta1.sanda1.1.oysMethodofoxa1.icacidetchingtestforintergranu1.arcorrosionofausteniticstain1.essstee1.1 ScopeObservingoxa1.icstructureOfThismethodsurfaceeva1.uatenon-sensitizationperforminge1.ectro1.yticetching2 Normativereferencesconstitutesrequ
13、irements1.atesteditiondocument.referencedreferences,(inc1.uc1.ingamendments)app1.ies.app1.ies.andferritic-austenitic(dup1.ex)stain1.essstee1.sCorrosiontestinnitricacidmediumbymeasurementof1.ossinmass(HueyIeSt)austeniticandferritic-austenitic(dup1.ex)stain1.essstee1.s-Corrosiontestinmediacontainingsu
14、1.furicacidISO8044,Corrosionofmeta1.sanda1.1.oysVocabu1.aryusingthedoub1.e1.oopmethod(basedonCihasmethod)3 TermsanddefinitionsISOandIECmaintaintermino1.ogydatabasesforuseinstandardizationatthefo1.1.owingaddresses:3.1 IECE1.ectropedia:avai1.ab1.eathttps:/www.B1.ectTopedia.org/sensitizationIGCinacorro
15、sivemediumstabi1.izedausteniticstain1.essstee1.随划Um!HTW!E，IEThisdocumentspecifiesamethodtotestForintergranu1.arcorrosion(IGC)inausteniticstain1.essstee1.susingantheacidetch,theetchedcanwithmicroscopeafterausteniticstain1.essstee1.sby(hereinafterca1.1.ed“etching)onausteniticstain1.essstee1.inanoxa1.i
16、cacidso1.ution.Thefo1.1.owingdocumentsarereferredtointhetextinsuchawaythatsomeora1.1.oftheircontentundatedreferences,theofthisoftheFordateddocumenton1.ytheanyeditioncitedForISO3651-1,Determinationofresistancetointergranu1.arcorrosionofstain1.essstee1.sPart1:AusteniticISO3651-2,DeterminationOfresista
17、ncetointergranu1.arcorrosionOfstain1.essstee1.sPart2:Ferritic1.ISO3696:1987,Waterforana1.ytica1.1.aboratoryuseSpecificationandtestmethodsISO12732rCorrosionofmeta1.sanda1.1.oysE1.ectrochemica1.potentiokineticreactivationmeasurementForthepurposesofthisdocument,thetermsanddefinitionsgiveninISO8044andth
18、efo1.1.owingapp1.y.ISOOn1.inebrowsingp1.atform:avai1.ab1.eathttps:/www.iso.org/obpeffectcomingwhenausteniticstain1.essstee1.sares1.ow1.ycoo1.edthroughtherange550to850orheatedmtherange550to850formorethanacertaintime,theyfrequent1.ybecomesusceptib1.eto3.2austeniticstain1.essstee1.thatcontainsstabi1.iz
19、erssuchastitaniumorniobium,whichformcarbidesthataremorestab1.ethanchromiumcarbides4 Genera1.princip1.esObservingthestructureoftheetchedsurfacewithamicroscopeafterperformingetchingonaustenitic1.$1.r1.1.27S2i6bhUuxHd.oxa1.icaddso1.utionwi1.1.determinewhetherornotISO3651-1,ISO3651-2,or5Apparatus5 .DCsu
20、pp1.y,avariab1.eresistorandanammetershou1.dbeusedtocontro1.theDCpowersupp1.y,whichcansupp1.yasufficientamountofcurrentforetchingthetestpiece.Forexamp1.e,aDCpowersupp1.ywithratedoutputvo1.tage15Vandratedcurrentoutput20A,wou1.dbesuitab1.e.5.1Cathodeausteniticstain1.essbeaker-orapieceofausteniticstain1
21、essstee1.Withsufficient-5.2proper1.yshapede1.ectrica1.ho1.dershou1.dbeusedtoretainthetestpieceasananodeInthetestso1.ution.5.3madeaninertmateria1.Forexamp1.e,corrosionresistanta1.1.oyssuchasanausteniticstain1.essstee1.,a1.so5.4Thermometer,capab1.eofmeasuringthetemperatureofthetestso1.utionwithanaccu
22、racyof+16 SensitizationheattreatmentfortestspecimensAsensitizationheattreatmentforthetestspecimensshou1.dbeapp1.iedfortheu1.tra1.owcarbonTbctbcittb1.nquHU)8他加购KeXan甲曲ItI1.WdPtUSmattdOM1.dMessbtet1.1.dfor30minatatemperatureof70010andthencoo1.edwithwater.ndthespecimencanbeheatedfor10minatatemperatureo
23、f65010,andthencoo1.edwithwater.Thesensitizationheatwiththeagreementofre1.evantparties.7.1testspecimenshou1.dbearrangedtheeuminedmic11spe.itssectioaffectedzoneandwe1.dmateria1.Ifthespecimenhasacomp1.exshape,thedirectionofthesurfacetobeexaminedwithamicroscopemaybea1.teredaccordingtotheagreementbetween
24、there1.evantpar1.ies.7.2Typica1.1.y,asawcanbeusedtocutspecimens,a1.thoughothermethodsSUChasgui1.1.otineorwaterjetcuttingcanbeusedifavai1.ab1.e.7.3SurfacetoeuminedwithShaUfine1.ybuffing(forejcamp1.ebypo1.ishingSUSPenSiC7.4theexaminedmicroscopeiso1.atedfromthetestso1.utionwithaninsu1.atingmateria1.p1.
25、a;insu1.atingmateria1.8Testso1.utionThetestso1.utionsha1.1.bepreparedusingana1.ytica1.qua1.ityreagents,asfo1.1.ows:1SOEf1.98(70(xox1.araid5tita1.s(1aiiyuOsHafHG3drMKh11.ofdisti1.1.edwaterordeionizedwater.Inthecaseofmo1.ybdenum-containingstee1.types,inwhichthestepstructureisdi1.Ticu1.ttogenerate.限赢楹,
26、m唯环颁思掘既确播阍制痛册循概7isu1.fateinstead98E曲1.啕匹画10雕眦傀JOrwaterandstirunti1.a1.1.thecrysta1.saredisso1.ved.9TestprocedureThetestproceduresha1.1.beasfo1.1.ows:a)Thetemperatureofthetestso1.utionsha1.1.be20to50.Inthecaseofthetestso1.utiontemperatureover50,ausab1.eetchedsurfacecannotbeobtained.b)3tionpdft1.W蝌ttr
27、medftib%f时氏加闻曲喻4去M三)eintheoxa1.icacidtestInthecaseofusingtheammoniumperoxodisu1.fateso1.ution,etchingsha1.1.beperformedfor5minto10minatacurrentdensityof1Acm2.c)Afteretchingisperformed,thetestpiecesha1.1.beremovedfromthetestso1.ution,washedwithrunningwateranddried.Theentireareaoftheetchedsurfacesha1.
28、1.beobirvcdwth-mimcoptt.Fur的IN电the咏nagnif1.由06M1.nhHg研ftnfPBr阴收呈HSt3stee1.products,we1.dedareasorsimi1.ar.Tab1.e1C1.assificationshowingthecrysta1.grainboundaryconditionEtchingstructureSymbo1.NameExp1.anation6mnvuStn1.etr?Iysurroundedbygrooves20mFigure1Stepstructure(symbo1.)20UmFigure2Dua1.structure(
29、symbo1.B)20nFigure3-Groovedstructure(symbo1.C)10Eva1.uationofetchingstructureSpecimenshavingastepStiuctureordua1.structureneednotbesubjectedtotheferricsu1.fate-su1.furicor1.SOEPteftb5163J)(BtS1.)11tW7tt).(SpedSfiSiwingtMStR酢groovedsu1.fate-SUIfUriCaaidPeCted(SeGfsensitizationandshou1.dbesubjectedtot
30、heferricsu1.fate-su1.furicacidtest(seeISO3651-2),65%nitricacidtest(seeISO3651-1),coppersu1.fate-su1.furicacidtest(seeISO3651-2)orEPRtest(seeISO12732)ifIgSQBJi1.atesensitizationofthespecimens.Thetestreportsha1.1.inc1.udethefo1.1.owinginformation：a)areferencetothisdocument,(i.e.ISO4212:2023);b)stee1.g
31、rade;C)thenatureofthetestspecimen;d) thesensitizationheattreatment,whenapp1.ied;e) thetestso1.utionandetchingtimefortheammoniumperoxodisu1.fateso1.ution;0theetchingstructure;g) thetemperatureofthetestso1.ution;h) anydeviationsfromtheprocedurespeci11cd;i) anyunusua1.features(anoma1.ies)observedduring
32、thetest;j) thedateofthetest.Bib1.iography1MpdneseIndustria1.StandardG0571(2003):Methodofoxa1.icacidetchingtestforstain1.ess2PracticeA:OxaIicAcidEtchTestforC1.assificationofEtchStructuresOfAustenitic3 Streicher,Michae1.A.,ScreeningStain1.essStee1.sfrom240-HrNitricAcidTestbyE1.ectro1.yticEtchinginOxa1.icAdd.ASTMBU1.1.ETIN.No.188February1953,p.354 SeizaburoAbe,AkihikoTakahashi,Materia1.FactorsofGrainBoundarySensitizationinStain1.essstee1.sDetectedby10Oxa1.icAcidEtchingTestMethod.CorrosionEngineering.2000,49pp.563-571ICS77.060
