ISO 04905-2023.docx
INTERNATIONA1.STANDARDISO4905editionFirst2O23-O2Corrosionofmeta1.sanda1.1.oys一E1.ectrochemica1.testmethodsforhigh-temperaturecorrosiontestingofmeta1.1.icmateria1.sinmo1.tensa1.tsCorrosiondesmetauxeta1.1.iagesMethodesdtessaise1.ectrochimiquesdecorrosionahautetemperaturedemateriau×mta1.1.iquesdansdesseisfondus©ISO2023COPYRIGHTPROTECTEDDOCUMENT©ISO2023IUirhM*hedbdi1.iUedotherwiseupdhi.o啪InyM1.tta0Dmk<nroni(ncm11ni10tf1.*Mqn1.C6pW11opypMRationmaytheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbe1.oworISO'smemberbodyinthecountr)oftherequester.f),WV>fifiU81.andonnet8CH-1214Vernier,GenevaPhone：M1.22749O1.11觥ftte:丽丽BQrgPub1.ishedinSwitzer1.and©ISO2023-A1.1.rightsreservedCorrosionofmeta1.sanda1.1.oysE1.ectrochemica1.testmethodsforhigh-temperaturecorrosiontestingofmeta1.1.icmateria1.sinmo1.tensa1.ts1 Scopespectroscopy(EIS),Potentiodynamicexperimenta1.measurementsande1.ectrochemica1.impedance2 Normativereferencesconstitutesrequirenents1.atesteditiondoment.referencedreferences,(inc1.udingamendments)app1.ies.app1.ies.STME220,Standardmethodforca1.ibrationofthermocoup1.esbycomparisontechniquesinsta1.1.ationStandardtestmethodfortestingsheathedthermocoup1.espriorto,duringandafter3 TermsanddefinitionsISOandIECmaintaintennino1.ogydatabasesforuseinstandardizationatthefo1.1.owingaddresses：-E1.ectropedia:avai1.ab1.eathUpww.HeampediaQrg/4.1 Genera!ande1.ectrochemica1.Ce1.1.furnacedesignofac1.osed,vertica1.,apparatusisshowninPur1.4.2.1Thisdocumentdescribesthegenera1.procedurefore1.ectrochemica1.measurementsinhigh-temperaturemo1.tensa1.tsusingdescribesthepo1.arizationapparatus.Thefo1.1.owingdocumentsarereferredtointhetextinsuchawaythatsomeora1.1.oftheircontentundatedreferences,theofthisoftheFordateddocumenton1.yIheanyeditioncitedForISO8044,CorrosionOfmeta1.sanda1.1.oysVocabu1.aryASTME230.Standardtemperature-e1.ectromotiveforcestab1.esforstandardizedthermocoup1.esASTME1350,Forthepurposesofthisdocument,thetermsanddefinitionsgiveninISO8044app1.y.ISOOn1.inebrowsingp1.atform:avai1.ab1.eathttps:/www.iso.org/obp4IECApparahisThetestapparatusshou1.dconsistofahea1.ingunit,gasfeedingunit,e1.ectrochemica1.measurementunit4.2HeatingunitorAbasicuniformtemperature.Sha1.1.heatingcomposedsha1.1.beequippedWithfumacesectioncapab1.etestiso1.atingthetestpiecesfromoutsideair.temperaturetemperahiredistributiondetermineheatingunitsha1.1.characterizedbytheexposureKeyiEcurrentdensity,expressedinA/mzpotentia1.,expressedinVvs.Agg÷potentia1.(0,1mo1.efraction)*2A1.1.oy6003A1.1.oy625NOTEIn2Smo1.%NaCI-25moi%KCI-16,6%Na2SO4-16,6%K2SO-16,6%Z11SO1.Figure4Po1.arizationcurvesofNi-basea1.1.oysunderaircontaining(10%HzO÷10000ppmHCI)at873Krecordedatpotentia1.scanrateof1mVs5.3.3theworkinge1.ectrodeCcurrent)Withe1.ectiodeamp1.itudethree-e1.ectrodesystem,andbetweenbehveenworkinge1.ectrodesforthetwo-e1.ectrodesystem.Theamp1.itudeoftheapp1.iedvo1.tageshou1.dbasbma1.!cRuseh11hefroopbntQrdbptortM1.ocuBrait)atederiwcy!idroiagB.tEiceBte11sirenHinutb1.tensa1.tsunderimmersionconditions.Onthebasisofthecurrent(orvo1.tage)response,recordtheabso1.uteva1.ueoftheimpedanceandphaseshiftsothataBodediagramcanbep1.otted,andrecordtherea1.part船dIS0iA确#aq，A朋RreXanM除脑皿。砸跖黜曲鼬剖感Mjd町珊松ur福解ixe利俗感ndescribedch1.oridesandsu1.fatesat873KareshowninFigureS.TheBodediagramindicatesthecorrosionresistanceofA1.1.oy625ishigherthanthatofA1.1.oy214inthisme1.t.M,EForcx31.c,6fttamp1.i1.udcof1B1jdchcyfrfQ8ft6ftfdkH1.tagctofAtcndsmh,<WC1.W(9firposcofthedetermininggenera1.trendsandforcomparingmateria1.s.IZIIO0IO1IO2IO310，0o-20-4060-80IO210,IO010'IO2IO310«/Keyff.1impedance,CXPrCSSCdinohmsquaremeterfphaseshift,expressedindegreefrequency,expressedinhertzU2A1.1.oy214NOTEIn25mo1.%NaCI-25mo1.%KCI-16.6%Na2S04-16,6%K2SO4-16,6%ZnSO¼Figure5BodediagramofNibasea1.1.oysmeasuredunderaircontaining(10%HzO+10000ppmHC1.)at873K6Testreport6.1 Genera1.Thetestreportsha1.1.inc1.udethefo1.1.owinginformationwhichiscommonforbothpotentiodynamicpo1.arizationandEISmeasurements：a) referencetothisdocument,i.e.ISO4905；b) materia1.,件痴whichthespecimensweretaken：position,c) methodofmanufacturingthespecimensanddetai1.softhesurfacepreparation；d) mo1.tensa1.tcomposition,vo1.umeandtemperature：e) compositionandf1.owrateofthetestgas；f) vo1.umeoftestchamber;g) measureddimensionsandca1.cu1.atedareaofthespecimenexposedtothetestso1.ution;h) descriptionofce1.1.ande1.ectrodesused;i) timerequiredtocheckstabi1.ityandthetimeofimmersionpriortopo1.arizationorEISmeasurement.InaUdition-totheaboveitems,thereportsha1.1.containthetechnique-dependentinformation,asgivenin6.2and6.3.6.2 Reportswithpotentiodynamicpo1.arizationmeasurementsa) open-circuit
