1.Scope
1.1Thispracticecoverstheapparatus,procedure,and
conditionsrequiredtocreateandmaintainthesaltspray(fog)
testenvironment.Suitableapparatuswhichmaybeusedis
describedin AppendixX1.
1.2Thispracticedoesnotprescribethetypeoftestspeci-
menorexposureperiodstobeusedforaspecificproduct,nor
theinterpretationtobegiventotheresults.
1.3ThevaluesstatedinSIunitsaretoberegardedasthe
standard.Thevaluesgiveninparenthesesareforinformation
only.
1.4 Thisstandarddoesnotpurporttoaddressallofthe
safetyconcerns,ifany,associatedwithitsuse.Itisthe
responsibilityoftheuserofthisstandardtoestablishappro-
priatesafetyandhealthpracticesanddeterminetheapplica-
bilityofregulatorylimitationspriortouse.
2.ReferencedDocuments
2.1 ASTMStandards:
2
B368 TestMethodforCopper-AcceleratedAceticAcid-
SaltSpray(Fog)Testing(CASSTest)
D609 PracticeforPreparationofCold-RolledSteelPanels
forTestingPaint,Varnish,ConversionCoatings,and
RelatedCoatingProducts
D1193 SpecificationforReagentWater
D1654 TestMethodforEvaluationofPaintedorCoated
SpecimensSubjectedtoCorrosiveEnvironments
E70 TestMethodforpHofAqueousSolutionsWiththe
GlassElectrode
E691 PracticeforConductinganInterlaboratoryStudyto
DeterminethePrecisionofaTestMethod
G85 PracticeforModifiedSaltSpray(Fog)Testing
3.SignificanceandUse
3.1Thispracticeprovidesacontrolledcorrosiveenviron-
mentwhichhasbeenutilizedtoproducerelativecorrosion
resistanceinformationforspecimensofmetalsandcoated
metalsexposedinagiventestchamber.
3.2Predictionofperformanceinnaturalenvironmentshas
seldombeencorrelatedwithsaltsprayresultswhenusedas
standalonedata.
3.2.1Correlationandextrapolationofcorrosionperfor-
mancebasedonexposuretothetestenvironmentprovidedby
thispracticearenotalwayspredictable.
3.2.2Correlationandextrapolationshouldbeconsidered
onlyincaseswhereappropriatecorroboratinglong-termatmo-
sphericexposureshavebeenconducted.
3.3Thereproducibilityofresultsinthesaltsprayexposure
ishighlydependentonthetypeofspecimenstestedandthe
evaluationcriteriaselected,aswellasthecontrolofthe
operatingvariables.Inanytestingprogram,sufficientrepli-
catesshouldbeincludedtoestablishthevariabilityofthe
results.Variabilityhasbeenobservedwhensimilarspecimens
aretestedindifferentfogchamberseventhoughthetesting
conditionsarenominallysimilarandwithintherangesspeci-
fiedinthispractice.
4.Apparatus
4.1Theapparatusrequiredforsaltspray(fog)exposure
consistsofafogchamber,asaltsolutionreservoir,asupplyof
suitablyconditionedcompressedair,oneormoreatomizing
nozzles,specimensupports,provisionforheatingthechamber,2775
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