normazioneCORROSIONTESTS50180Page:1/16ThisStandardcoversproceduresandequipmentforcorrosiontesting,andspecifiesscopeofthevari-oustests.ThisStandardcancelsandsubstitutesStds.50182,50469/01,50493,50493/01,50507and7.G2050.ThisStandardconsistsof16pages.ChangeDescription=A=9thEdition-Revised.CompositionofsoIutionformethodC2corrected.10thEdition-Modifiedpoint.EditoriaImodifications(FD)FACONFIDENTIALEdition10Ch-CodeTMDTHISDOCUMENTMUSTNOTBEREPRODUCEWITHOUTPRIORWRITTENC2THISDOcUMENTMUSTNOTBEREPRODUcEDORcIRcULATEDTOTHETHIRDPARTIESWITHOUTPRIORWRITTENcONSENTBYFIATAUTOS.P.A.100%REcYcLEDPAPERcARTARIcIcLATA100%change1GENERALThisstandardcoversprocedure(time,ambientconditionsandapparaturosiontests:一MethodA1一saItspraytest一MethodA2一Aceticacid一saItspraytest一MethodA3一copper一acceIeratedaceticacidsaItspraytest一MethodB1一sub一surfacesaItspraycorrosiontestonscribedspecimens一MethodB2一Dip一typesub一surfacecorrosiontestafterpunching(stone一chipping)一Methodc1一corrosiontestbyimmersioninacidsoIution一Methodc2一corrosiontestbyimmersioninbasicsoIution一Methodc3一corrosiontestbyimmersionincopper一acceIeratedaceticacidsaItsoIution一MethodD1一kesternichcorrosiontest(industriaIatmosphere)一MethodD2一kesternichcorrosiontest(inreducphere)一MethodD3一corrosiontestinforceddraughtofindustriaIatmospherePurposeThesestandardizedtestsprovideanacceIeratedmeansofsimuIserviceincorrosiveenvironmentsonmateriaIs,coatings,partsandcomponents.Scope一MethodA1一FormetaIIicmateriaIsandmisceIIaneousorganic,inorganic,chemi-caIandeIectroIyticcoatings.一MethodA2一PreferabIeforinorganicchemicaIcoatingsandeIectroIyticcoatings,whichareonIysIightIyreactive(e.g.:chromeonsteeIorzincaIIoy,anodicoxidationonaIuminiumetc.).一MethodA3一ForthesamecoatingsasMethodA2.Thismeth一MethodB1andB2一Fororganiccoatings.一Methodc1一ForexhaustsiIencers.一Methodc2andc3一PreferabIyforuseonmetaIIizedcoatingproducedbysubIimationandcondensationunderhighvacuum.一MethodD1一FormetaIIicmateriaIsandinorganic,chemicaIandeIectroIyticcoa-tings.一MethodD2一Fororganiccoatings.一MethodD3一ForprotectiveoiIcoatingsonsheetmetaI,Iubricantsfandforprotectiveproductsusedafterpressing.tionsofthemateriaI,coating,partorcomponentduringserviceasweIIasthechemicaIcomposi-tionofcorrosiveag3100%RECYCLEDPAPER100%RECYCLEDPAPERTHISDOCUMENTMUSTNOTBEREPRODUCEWITHOUTPRIORWRITTENC50180Change2PRINCIPLESOFTESTMETHODS2.1MethodsA1,A2,A3,C2,C3,D1,D2andD3Thesemethodsarebasedontheappearance,inagiventimeandunderattackents,ofmarksorspotsdifferingincoIourorappearancefromthesurfacebeinginspected.2.2MethodsB1andB2ThesemethodsarebasedonevaIuationofpropagationofbeyondincisionIinesorpunchedpoints,madebeforeexposuretoattack.2.3MethodC1incorrosiveagent.3CLASSIFICATIONANDTESTCONDITIONSonthebasisoftestconditions,environmentaItestsarecIassifiedaccordingtoseverityIeveIsothateffectsofdifferingintensitywibesimuIated.3.1ParametersTheseverityIeveIofeachcorrosiontestwiIIbeafunctionofthe一Concentrationofcorrosiveagentse一DegreeofcorrosivenessofagentseIected;UnIessotherwisespecifiedonreIevantStandards,theconditionsIaiddowninthefoIIowingpara-graphsshaIIbeadheredtoinestabIishingseverityIeveIforeachtest.3.1.1Concentrationofcorrosiveagentselected(MethodD3only)FiIIsuppIycyIinderdescribedinpara.5.5forthistestwithSo2ando2insuchproportionsasto25p.p.m.ofSo2.TheSo2一o2mixtureintroducedinthecyIindershaIIbesufficienttosuppIythebeIIjarcontainingthetestspecimensforatIeast200h.ForexampIe,toobtainafinaImixtureof8toNOTE:Theratioshouldbe“X:(3130+X)=10:106”,butofairisnegligible,saidvaluehasbeenomitted.4THISDOCUMENTMUSTNOTBEREPRODUCEWITHOUTPRIORWRITTENC100%RECYCLEDPAPERChangeThususeacapiIIarytube回whichwiIIaIIowagreaterfIow.IfthecapThusNOTE:TheO2contenthasbeenignoredinthecalculationasitisnegligiblecom-paredtotheairflow.ThefoIIowingisapracticaIsystemoffiIIingthesuppIycyIinder:definedesiredpressureofSo2一o2mixtureinthecyIinderandthendeterminethepressureexertedbySo2aIone.IntroduceSo2inthecyIinderandaddo2untiItotaIrequiredpressurehasbeenreached.If,forexampIe,requiredpressureincyIinderis8360m(inamixtureat2426p.p.m.)canbedeteThusThus3.1.2DegreeofcorrosivenessofagentSincethedegreeofcorrosivenessoftheagentseIecteddeptocIassifythedegreeofcorrosivenessoftionofthecorrosiveagent,specificationsinpara.1.3andpara.6shouIdbek3.1.3DurationoftestseIectedonsampIebeingtested.IngeneraI,itshaIIbeseIectedfromthefoIIowing:4DESIGNATION4.1dard,shaIIconsistof:1)Descriptionoftestmethodaccordingt2)Durationoftestaccordingtopara.3.1.35100%RECYCLEDPAPER100%RECYCLEDPAPERTHISDOCUMENTMUSTNOTBEREPRODUCEWITHOUTPRIORWRITTENC50180Change4.2Exampleofdesignation55.1MethodsA1,A2,A3andB15.1.1FogchamberFogchamberpreferabIycubic,inwhichcorrosivesoIutionisatomised.esterresin,gIass,methacryIateester,stoneware).IfpossibIe,exteriorofchambershaIIbement).ChambershaIIaIsobeproviwhichaccumuIatethroughcondensationoninteriorofchamberorwhichfaIIfromspecimensbeingtested.NOTE:Therearenodimensionalrequirementsforthechamber,thoughthereshouldbelittlediffer-encebetweenlength,widthandheight.ceilingorcoverofthechambershallbesuchastopreventdropsofsolutionaccumulatingthroughcondensationfromfailingonspecimensbeingtested.5.1.2HeaterHeatercapabIeofreachingandmaintainingchambertemperaturespecifiedinpara.6.TheheatershaIIbeequippedwithanadequateIysensitivethermostat(seepara.5sureuniformityoftemperatureinsideth5.1.3AirsupplyandconditioningsystemAirsuppIyandconditioningsystemconsistingof:一Asourceofcompressedairatapressureof0.7to1.7barfreefromoiIandfromimpuritiespaperpIacedatadistanceofapprox.20cmfromthedry一typenozzIe);一Apressureregulatorvalve,wherecompressedairpressureexceeds1.7bar;一AhumidifiertomaintainthesoIutionatthetemperatureinthechamber(i.e.topreventThehumidifiermustbeprovidedwithathermostatto6THISDOCUMENTMUSTNOTBEREPRODUCEWITHOUTPRIORWRITTENC100%RECYCLEDPAPERChange5.1.4AtomizerAtomizerconstructedininertmateriaI(e.g.gIassormethacryIateester).Atomizershowninfig.1asanexampIeissufficientfora200dm3chamberandconsumesapprox.4Ievery24hours.LargerchamberscanbeprovidedwithgreaternumberprovidedthatpIuvstrikespecimensundertestdirectIy.5.1.5ReservoirIeast3or4daysoperati5.1.6ThermometerThermometer,directreading,tomeasuretemperatureinthechamber.Thethermometerandsensorofthethermostatasperpara.5.1.2shaIIbeadjacent;bothshaIIbeatIeast10c5.1.7FogcollectorConsistingofa100mmgIasarubberstopperintoa250cm3graduate5.1.8Scriber(MethodB1onIy).5.1.9AdhesivetapeInfIexibIevinyIpIasticasperP.S.9.55367/06(MethodsB1andB2onIy:aIsoseepara.5.2.3).5.2MethodsB2,C2andC35.2.1BasinInpIexigIassofsuitabIedimensions.7100%RECYCLEDPAPER100%RECYCLEDPAPERTHISDOCUMENTMUSTNOTBEREPRODUCEWITHOUTPRIORWRITTENC50180Change5.2.2RackFormovingspecimen,partorcompone5.2.3AdhesivetapeAsperpara.5.1.9(MethodB2onIy).5.2.4StrikerSpring一type,5000to5500gIoad(ECCILIPSEtypeNo.171),MethodB2onIy.5.3MethodC15.3.1Cylindricalglassvessel5.3.2ThermostatchamberAsperStd.50184(describedforMethodA).5.4MethodsD1andD25.4.1SheetmetalchamberInternaIIycoatedwithair一tightsheets5.4.2HeatingdevicewithsuitabIetemperaturecontroI.5.4.3Gas(suIphurdioxide)measuringdevice5.4.4ThermometerForcontroIIingtemperatureinsidethechamber.5.4.5SpecimencarrierInpIexigIass5.5MethodD3ThetestapparatusforproducinganatmospherewiinFig.2,consistofthefoIIow5.5.1Airsource(pump)可capabIeofmaintainingaconstantfIowof3130crn3/min.8THISDOCUMENTMUSTNOTBEREPRODUCEWITHOUTPRIORWRITTENC100%RECYCLEDPAPERChange5.5.2Norgrenfilter②equippedwithreducer.5.5.3500cm3Drechseelbottle③fiIIedwithgIasswooI.5.5.4500cm3Drechseelbottle囚containing250cm3of2to30%NaoH.5.5.5Threeormore500cm3Drechseelbottles回eachcontaining250cm3ofdistiIIedH2o.5.5.65000cm3container回providedwithhydrometerandthermometer.5.5.7Flowmeter口providedwithacapiIIarytubeaIIowingafIowofbetween1500and50005.5.8Flowmeter回providedwithacapiIIarytubeaIIowingafIowofbetween300and1200cm3/h.5.5.9Supplycylinder⑨providedwithmanometersandgascocksandcontainingaSo2一o2mixturepreparedasperpara..5.10100cm3Cylinder四forinitiaImixingofgasses.5.5.112000cm3FlasKforfinaIgasmixing.5.5.12Glassbelljarheight320mm,dia.180mm,airtight(specimenceII).5.5.13Supportheight270mm,dia.150mm.5.5.14HooKsstainIesssteeI,forsuspendingtestsampIes.5.5.15ManometerforcontroIofpressureinsidebeIIjar.5.5.16250cm3Drechseelbottlecontaining125cm312MH2o2fordischargeofSo2一o2一airmix-ture.5.5.17Diffusors9100%RECYCLEDPAPER100%RECYCLEDPAPERTHISDOCUMENTMUSTNOTBEREPRODUCEWITHOUTPRIORWRITTENC50180ChangeTESTSAMPLESTESTSAMPLESFig.26CHEMICALCOMPOSITIONOFCORROSIVEENVIRONMENTSTHISDOcUMENTMUSTNOTBEREPRODUcEDORcIRcULATEDTOTHETHIRDPARTIESWITHOUTPRIORWRITTENcONSENTBYFIATAUTOS.P.A.100%REcYcLEDPAPERcARTARIcIcLATA100%changeMethodcompositionofcorrosivesolution》pH口Pluviometricconstantcm3/h▽Sodiumchloride●AcidcypricchloridedihydrateHydrogenperoxide120M48%Idrobromicacid38%sulphuricacidAnhydroussodiumSulphurdioxideOxygenWaterorhumidityA1saItspraytest◆A2A3copperacceI-B1sub一surfacescribedspeci-◆(stone一chip-20%byweightwaterqs.TOBEDEFINEDc1corrosiontest1,40cm3/Ic2corrosiontest0,2%byweightc3corrosiontest5%byweight0,66%■0,25%★corrosiontestseep.3.1.1Temperatureoc 100%RECYCLEDPAPER100%RECYCLEDPAPERTHISDOCUMENTMUSTNOTBEREPRODUCEWITHOUTPRIORWRITTENC50180Change》SoIutioncoIIectedinfogcoIIector(MethodsA1,A2,A3andB1onIy)shaIIbeofpositionasoriginaIsoIution.CompositionshaIIbetestedbyartionoccurs,atomizedairistoohumid,inwhichcasereducetemperatureofwaterinthecreasehumiditybyraisingthewatertemperatureinthehumidifierordecreasingsuppIyofairbubbIes.onceoptimumconditionshavebeenreached,soIutionmaybeusedforIongperiods.口SoastopreventthepresenceofCo2whitisadvisabIetousewaterwhichhasjustbeenboiIed.●SodiumchIoridesh■Testconditionsareobtainedbyintroducing2IofSo2inthekesternichchamber(capacityapprox.300I)inwhich4IofdistiIIedwater★Testconditionsareobtainedbyintroducing0.75IofSo2inthekesternichchamber(capac-▽ThepIuviometricconstant,whichisafunctionofthefogconcentration,isfoundingthefinecondensateprecTodeterminepIuviometricconstant,usefogcoIIectorpositionedasfaraspossibIefromthenozzIesothatitdoesnotcoIIectdropsfaiIingshaIIcorrespondtospecifiedvaIues.7TESTPROCEDUREPreparationofsurfaces7.1.1MethodsA1,A2,A3,C2,C3,D1,DUnIessotherwisespecifiedthesurfaceundertest(coatedornot),shaIIbethoroughIydegreasedusingsoIventvapoursandthenbecIeanedusingasuitabIedetergent.AfterInthecaseofconversionIayersorIayerswhichhavebeenpurposubstancesforprotection,preparationofsurfacesshaIIbeasspecifiedondrawingorreIatedStandard.Ifspecimenshavebeenpreparedfromcoatedpieces,cutedgesshaIIbecoveredwithsuitabIeadhesivetapesothatcorrosionpropagatingfromedgesdoesnotinterferewithresuIts.THISDOCUMENTMUSTNOTBEREPRODUCEWITHOUTPRIORWRITTENC100%RECYCLEDpApERChange7.1.2MethodBCarryoutoperationsinpara..2.2usingscriberasperpara.5.1.8,cuttwointersectingdiagonaIsoverhaIfofthesurface.scribedIinesshaIInotextendto7.1.3MethodBCarryoutoperationsinpara..3.2usingspringIoadedstrikerasperpara.5.2.4make9punchmarksexposingunderIyingmetaI.punchmarksshaIIbeevenIyspacedandapproximateIy20mmapart.7.1.4MethodC1CIeansurfacebeingtestedbyrubbingwithabrassbrushanddampCasO4powder;firstwashwithwaterandthenwithacetone,bIow一dryandthenspecimenedgeswithpeeIabIeresincoating(p.s.9.56483)foraheightofapprox.0.5cm.7.1.5MethodD3antbeingtested.Procedure7.2.1MethodsA1,A2,A3andBExposureExposureconditionsinchamberareasfoIIows:一specimensupportshaIIbeinertnonmetaIIicmateriaI(pitch一pine,gIabeusedunderanycircumstances;一ThesignificantsurfaceofthespecimenshaIIfaceupwardssoastoformanang5。fromtheverticaI.whenevaIuatingresuIts,surfacesfacingdownwardsshaIInotbetakenintoaccount;一severaIIayersofspecimensmaybeexposedatthesametimeinthechamberprovidedthatsoIutionfromonespecimendoesnoresuIts;100%RECYCLEDPAPER100%RECYCLEDPAPERTHISDOCUMENTMUSTNOTBEREPRODUCEWITHOUTPRIORWRITTENC50180ChangeExtractionfingers;theuseofIaboratorYforcepsisadvised.AfterextractionimmersesampIesincIeanrunningwater,washwithdistiIIedwaterandcorrosionproductsfrombeingseparatedorremoved,especiaIIYinthecaseofIighspecimens.operationsinparas.and.7.2.2MethodBImmersetestspecimen,preparedasperpara.7.1.3insoIutionasperpara.6.Soakforspecifiedtime.AppIYaIengthofadhesivetape(para.5.2.3)toincisionsaccordingtospecificationsgivenforadhesiontestsinProcurementSpecificationfortapes(9.55367).upwardsmanuaIIY.7.2.3MethodC1Hangtestspecimenasperpara.7.1.4fromgIassrodpositionedintestingapparatusasperpara.5.3.1containingacidsoIutionasperpara..2AfterabovecYcIe,extracttestspecimen,freefrompeeIabIecoatingwithoutwashingandposi-ProtectedgesoftestspecimensagainusingpeeIabIeresin(seepara.)andrepeatoper-ationsofparas.,and.9timesforatotaIof200cYcIes,renewingacidsoI-utioneverY20cYcIes.THISDOCUMENTMUSTNOTBEREPRODUCEWITHOUTPRIORWRITTENCChangeAttheendoftest,extracttestspecimenfromthermostatchamber,cooIrapidIyunderwaterspraythencarefuIIyremovecorrosionproductsbymechanicaI,chemicaIoreIectroIyticmeans.AvoidasfaraspossibIedamagingmetaIsurface.washspecimenfirstinwaterandth7.2.4MethodsC2andC3Immersetestspecimenasperpara.7.1.1forthespecifiedtimeinsoIutionasperpara.6con-tainedinreservoirasperpara..2.4.2Afterimmersion,extractspecimenfrombath,washi7.2.5MethodsD1andDPositionspecimenasperpara.7.1.1onsupportasperpara.5.2FiIIbaseofchamberofpara.5.4withthequantityofdistiIIedwaterspecifSeaIchamberandintroducesuIphurdioxideusingappropriatesuppIydevice.QuantityofgasintroducedshaIIbeasspecifiedinpara..4forthespecifiedtime.Disconnectheatingdeviceandopenchamber.Leavespecimeninsidechamberatambienttemperaturefor16h.Removewaterfrominsidechamber.Repeatoperationsofparas.and.AftertestingwashspecimeninabundantwaterandbIow一drywithcompressedair.100%100%RECYCLEDPAPER100%RECYCLEDPAPER100%RECYCLEDPAPERTHISDOCUMENTMUSTNOTBEREPRODUC