ASTM-B117

Designation:B117–03StandardPracticeforOperatingSaltSpray(Fog)Apparatus1ThisstandardisissuedunderthefixeddesignationB117;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thispracticecoverstheapparatus,procedure,andconditionsrequiredtocreateandmaintainthesaltspray(fog)testenvironment.SuitableapparatuswhichmaybeusedisdescribedinAppendixX1.1.2Thispracticedoesnotprescribethetypeoftestspeci-menorexposureperiodstobeusedforaspecificproduct,northeinterpretationtobegiventotheresults.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Theinch-poundunitsinparenthesesareprovidedforinformationandmaybeapproximate.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:B368MethodforCopper-AcceleratedAceticAcid-SaltSpray(Fog)Testing(CASSTest)2D609PracticeforPreparationofCold-RolledSteelPanelsforTestingPaint,Varnish,ConversionCoatings,andRelatedCoatingProducts3D1193SpecificationforReagentWater4D1654TestMethodforEvaluationofPaintedorCoatedSpecimensSubjectedtoCorrosiveEnvironments3E70TestMethodforpHofAqueousSolutionswiththeGlassElectrode5E691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod6G85PracticeforModifiedSaltSpray(Fog)Testing73.SignificanceandUse3.1Thispracticeprovidesacontrolledcorrosiveenviron-mentwhichhasbeenutilizedtoproducerelativecorrosionresistanceinformationforspecimensofmetalsandcoatedmetalsexposedinagiventestchamber.3.2Predictionofperformanceinnaturalenvironmentshasseldombeencorrelatedwithsaltsprayresultswhenusedasstandalonedata.3.2.1Correlationandextrapolationofcorrosionperfor-mancebasedonexposuretothetestenvironmentprovidedbythispracticearenotalwayspredictable.3.2.2Correlationandextrapolationshouldbeconsideredonlyincaseswhereappropriatecorroboratinglong-termatmo-sphericexposureshavebeenconducted.3.3Thereproducibilityofresultsinthesaltsprayexposureishighlydependentonthetypeofspecimenstestedandtheevaluationcriteriaselected,aswellasthecontroloftheoperatingvariables.Inanytestingprogram,sufficientrepli-catesshouldbeincludedtoestablishthevariabilityoftheresults.Variabilityhasbeenobservedwhensimilarspecimensaretestedindifferentfogchamberseventhoughthetestingconditionsarenominallysimilarandwithintherangesspeci-fiedinthispractice.4.Apparatus4.1Theapparatusrequiredforsaltspray(fog)exposureconsistsofafogchamber,asaltsolutionreservoir,asupplyofsuitablyconditionedcompressedair,oneormoreatomizingnozzles,specimensupports,provisionforheatingthechamber,andnecessarymeansofcontrol.Thesizeanddetailedcon-structionoftheapparatusareoptional,providedtheconditionsobtainedmeettherequirementsofthispractice.4.2Dropsofsolutionwhichaccumulateontheceilingorcoverofthechambershallnotbepermittedtofallonthespecimensbeingexposed.1ThispracticeisunderthejurisdictionofASTMCommitteeG01onCorrosionofMetalsandisthedirectresponsibilityofSubcommitteeG01.05onLaboratoryCorrosionTests.CurrenteditionapprovedOctober1,2003.PublishedOctober2003.Originallyapprovedin1939.Lastpreviouseditionapprovedin2002asB117–02.2AnnualBookofASTMStandards,Vol02.05.3AnnualBookofASTMStandards,Vol06.01.4AnnualBookofASTMStandards,Vol11.01.5AnnualBookofASTMStandards,Vol15.05.6AnnualBookofASTMStandards,Vol14.02.7AnnualBookofASTMStandards,Vol03.02.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.CopyrightbyASTMInt'l(allrightsreserved);ThuMay2516:52:47EDT2006ReproductionauthorizedperLicenseAgreementwithMattLLaliberty(Nautilus,Inc.);4.3Dropsofsolutionwhichfallfromthespecimensshallnotbereturnedtothesolutionreservoirforrespraying.4.4Materialofconstructionshallbesuchthatitwillnotaffectthecorrosivenessofthefog.4.5AllwaterusedforthispracticeshallconformtoTypeIVwaterinSpecificationD1193(exceptthatforthispracticelimitsforchloridesandsodiummaybeignored).Thisdoesnotapplytorunningtapwater.Allotherwaterwillbereferredtoasreagentgrade.5.TestSpecimens5.1Thetypeandnumberoftestspecimenstobeused,aswellasthecriteriafortheevaluationofthetestresults,shallbedefinedinthespecificationscoveringthematerialorproductbeingexposedorshallbemutuallyagreeduponbetweenthepurchaserandtheseller.6.PreparationofTestSpecimens6.1Specimensshallbesuitablycleaned.Thecleaningmethodshallbeoptionaldependingonthenatureofthesurfaceandthecontaminants.Careshallbetakenthatspecimensarenotrecontaminatedaftercleaningbyexcessiveorcarelesshandling.6.2Specimensfortheevaluationofpaintsandotherorganiccoatingsshallbepreparedinaccordancewithapplicablespecification(s)forthematerial(s)beingexposed,orasagreeduponbetweenthepurchaserandthesupplier.Otherwise,thetestspecimensshall