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-circuitpotentia1.andwhetheritwassteady,andtheendpotentia1.；b) potentia1.scanrate；c) p1.otofapp1.iedcurrentdensityversusapp1.iedpotentia1.,inc1.udinganindicationofanycorrectionforso1.utionpotentia1.dropanditsmethodofeva1.uation.6.3 ReportswithEISmeasurementsa) amp1.itudeandfrequencyrangeofACvo1.tage；b) impedancep1.otinNyquistdiagramand/orBodediagram(ISO17474);c) recordthestateinwhichthetestwasconducted.©ISO2023-A1.1.rightsreservedAnnexA(informative)Examp1.esofmo1.tensa1.tsandtesttemperaturesinhigh-temperaturemo1.tensa1.tsTab1.eA.1.Mo1.tensa1.tsandtesttemperaturesTypesCompositionTesttemperature(mo1.%)()33.3%NaCI-33.3%KCi-33,3%1.iCI>450Nitrates60%NaNO-40%KNO>25050%NaNo3-50%KNOa>220(m.p.)AnnexBExamp1.eofreferencee1.ectrodefore1.ectrochemica1.measurementcrudb1.eB.1.formcdfromcxarnp1.eoftubereferencee1.ec1.rodemmrno1.tendiameter,6mmsu1.fate.e1.ongateddeterminingreferencerespective1.yrisused+as-Preferencee1.ectro1.yte.carbonates,equi1.ibriumreactionfor-238÷Oused.Tnu1.1.iteusingconductivewithoute1.ectro1.yte,suchasbeusedon1.yCOwhenbottomsa1.tContainingceramicsa1.t(informative)©ISO2023-A1.1.rightsreservedFigureshowsanmu1.1.itethe(forexamp1.e:4forinnerch1.orideandouterAndiameter150rnm1.ength)isusedasaceramicmembranewa1.1.Si1.verwireorp1.ateisusedasthereferencee1.ectrode,andthesamemo1.tensa1.tastheteste!ecto1.ytewithadded10mo1.%C1.org2SO4forch1.oridesorthesu1.fates,potentia1.AgeaAg.Formo1.tenThegase1.ectrodeof66,7%AgwireCO2and33,3%Ozisused.Thereferencepotentia1.isdeterminedby2C0z2+4e2C32,AnAue1.ectrodeisusedasthereferencee1.ectrode,andthesamemo1.tencarbonateisusedasthereferencee1.ectro1.yte.e1.ectro1.yteSinceWhenaNa*mo1.tensa1.tsso1.idNa*ions,itcan1.i2CO3-K23,themo1.tenoftheinertNa*istubeshou1.dhaveasma1.1.ho1.etoserveasaforreferencee1.ectrode(containingg)Figure8.1 Examp1.eofreference1airC1.CCyOmu1.1.itetube,3mmto6mm0deforAgp1.atethehigh-tenperaturemo1.tenBib1.iography1 ISO6344(a1.1.parts),CoatedabrasivesDeterminationanddesignationofgrainsizedistribution2 W"中钟跖丽侬情细银式锵W加da1.1.oysConventionsapp1.icab1.etoe1.ectrochemica1.3 qg&眄种S,哂也曲理小Pa播加d并画加&出版舱出胆阳气色嘛本Guide1.inesfor|4似的施4B。丽觌6即般丽Q衲(帆仰皿?如施情6勃啸姆幽幽视i三曲的晚testingof(5 FJft76<WPi?就和解ABrasivesDeterminationanddesignationofgrainsizedistribution-Pan(6 <PW9steJdftJoxide1.si1.iconcarbideandotherabrasivemateria1.sforcoated7里ITt招*Wde,si1.iconcarhideandotherabrasivemateria1.sforcoated8W1B74.12,SpecificationsfortheSizeofAbrasiveGrainGrindingWhee1.s,Po1.ishingandGenera1.ICS77.060
