ASTM B117 盐雾测试标准

美国盐雾测试标准Designation:B117–03
StandardPracticefor
OperatingSaltSpray(Fog)Apparatus1
ThisstandardisissuedunderthefixeddesignationB117;thenumberimmediatelyfollowingthedesignationindicatestheyearof
originaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.A
superscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.
ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.
1.Scope
1.1Thispracticecoverstheapparatus,procedure,and
conditionsrequiredtocreateandmaintainthesaltspray(fog)
testenvironment.Suitableapparatuswhichmaybeusedis
describedinAppendixX1.
1.2Thispracticedoesnotprescribethetypeoftestspeci-
menorexposureperiodstobeusedforaspecificproduct,nor
theinterpretationtobegiventotheresults.
1.3ThevaluesstatedinSIunitsaretoberegardedas
standard.Theinch-poundunitsinparenthesesareprovidedfor
informationandmaybeapproximate.
1.4 Thisstandarddoesnotpurporttoaddressallofthe
safetyconcerns,ifany,associatedwithitsuse.Itisthe
responsibilityoftheuserofthisstandardtoestablishappro-
priatesafetyandhealthpracticesanddeterminetheapplica-
bilityofregulatorylimitationspriortouse.
2.ReferencedDocuments
2.1 ASTMStandards:
B368MethodforCopper-AcceleratedAceticAcid-Salt
Spray(Fog)Testing(CASSTest)
2
D609PracticeforPreparationofCold-RolledSteelPanels
forTestingPaint,Varnish,ConversionCoatings,and
RelatedCoatingProducts3
D1193SpecificationforReagentWater
4
D1654TestMethodforEvaluationofPaintedorCoated
SpecimensSubjectedtoCorrosiveEnvironments3
E70TestMethodforpHofAqueousSolutionswiththe
GlassElectrode5
E691PracticeforConductinganInterlaboratoryStudyto
DeterminethePrecisionofaTestMethod6
G85PracticeforModifiedSaltSpray(Fog)Testing7
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,
andnecessarymeansofcontrol.Thesizeanddetailedcon-
structionoftheapparatusareoptional,providedtheconditions
obtainedmeettherequirementsofthispractice.
4.2Dropsofsolutionwhichaccumulateontheceilingor
coverofthechambershallnotbepermittedtofallonthe
specimensbeingexposed.
1
ThispracticeisunderthejurisdictionofASTMCommitteeG01onCorrosion
ofMetalsandisthedirectresponsibilityofSubcommitteeG01.05onLaboratory
CorrosionTests.
CurrenteditionapprovedOctober1,2003.PublishedOctober2003.Originally
approvedin1939.Lastpreviouseditionapprovedin2002asB117–02.
2
AnnualBookofASTMStandards,Vol02.05.
3
AnnualBookofASTMStandards,Vol06.01.
4
AnnualBookofASTMStandards,Vol11.01.
5
AnnualBookofASTMStandards,Vol15.05.
6
AnnualBookofASTMStandards,Vol14.02.
7
AnnualBookofASTMStandards,Vol03.02.4617