ASTM-B-117-2007 STANDARD PRACTICE FOR OPERATING SALT SPRAY (

Salt Spray

Designation:B117–07a

StandardPracticefor

OperatingSaltSpray(Fog)Apparatus1

Thisstandardisissuedunderthe xeddesignationB117;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.

1.Scope

1.1Thispracticecoverstheapparatus,procedure,andconditionsrequiredtocreateandmaintainthesaltspray(fog)testenvironment.SuitableapparatuswhichmaybeusedisinAppendixX1.

1.2Thispracticedoesnotprescribethetypeoftestspeci-menorexposureperiodstobeusedforaspeci cproduct,northeinterpretationtobegiventotheresults.

1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.

1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.

2.ReferencedDocuments2.1ASTMStandards:2

B368TestMethodforCopper-AcceleratedAceticAcid-SaltSpray(Fog)Testing(CASSTest)

D609PracticeforPreparationofCold-RolledSteelPanelsforTestingPaint,Varnish,ConversionCoatings,andRelatedCoatingProducts

D1193Speci cationforReagentWater

D1654TestMethodforEvaluationofPaintedorCoatedSpecimensSubjectedtoCorrosiveEnvironments

E70TestMethodforpHofAqueousSolutionsWiththeGlassElectrode

--`,,`,,,```,,,`,,,``,`,,``,,`,-`-`,,`,,`,`,,`---

E691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod

G85PracticeforModi edSaltSpray(Fog)Testing3.Signi canceandUse

3.1Thispracticeprovidesacontrolledcorrosiveenviron-mentwhichhasbeenutilizedtoproducerelativecorrosionresistanceinformationforspecimensofmetalsandcoatedmetalsexposedinagiventestchamber.

3.2Predictionofperformanceinnaturalenvironmentshasseldombeencorrelatedwithsaltsprayresultswhenusedasstandalonedata.

3.2.1Correlationandextrapolationofcorrosionperfor-mancebasedonexposuretothetestenvironmentprovidedbythispracticearenotalwayspredictable.

3.2.2Correlationandextrapolationshouldbeconsideredonlyincaseswhereappropriatecorroboratinglong-termatmo-sphericexposureshavebeenconducted.

3.3Thereproducibilityofresultsinthesaltsprayexposureishighlydependentonthetypeofspecimenstestedandtheevaluationcriteriaselected,aswellasthecontroloftheoperatingvariables.Inanytestingprogram,sufficientrepli-catesshouldbeincludedtoestablishthevariabilityoftheresults.Variabilityhasbeenobservedwhensimilarspecimensaretestedindifferentfogchamberseventhoughthetestingconditionsarenominallysimilarandwithintherangesspeci- edinthispractice.

4.Apparatus

4.1Theapparatusrequiredforsaltspray(fog)exposureconsistsofafogchamber,asaltsolutionreservoir,asupplyofsuitablyconditionedcompressedair,oneormoreatomizingnozzles,specimensupports,provisionforheatingthechamber,andnecessarymeansofcontrol.Thesizeanddetailedcon-structionoftheapparatusareoptional,providedtheconditionsobtainedmeettherequirementsofthispractice.

4.2Dropsofsolutionwhichaccumulateontheceilingorcoverofthechambershallnotbepermittedtofallonthespecimensbeingexposed.

ThispracticeisunderthejurisdictionofASTMCommitteeG01onCorrosionofMetalsandisthedirectresponsibilityofSubcommitteeG01.05onLaboratoryCorrosionTests.

CurrenteditionapprovedDec.15,http://www.77cn.com.cnstpreviouseditionapprovedin2007asB117–07.2

ForreferencedASTMstandards,visittheASTMwebsite,http://www.77cn.com.cn,orcontactASTMCustomerServiceatservice@http://www.77cn.com.cn.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.

1

Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.

Salt Spray

4.3Dropsofsolutionwhichfallfromthespecimensshall7.1.2Thespecimensshallnotcontacteachotheroranynotbereturnedtothesolutionreservoirforrespraying.

metallicmaterialoranymaterialcapableofactingasawick.4.4Materialofconstructionshallbesuchthatitwillnot7.1.3Eachspecimenshallbeplacedtopermitunencum-affectthecorrosivenessofthefog.

beredexposuretothefog.

4.5AllwaterusedforthispracticeshallconformtoTypeIV7.1.4SaltsolutionfromonespecimenshallnotdriponanywaterinSpeci cationD1193(exceptthatforthispracticeotherspecimen.

limitsforchloridesandsodiummaybeignored).Thisdoesnotapplytorunningtapwater.AllotherwaterwillbereferredtoNOTE2—Suitablematerialsfortheconstructionorcoatingofracksandasreagentgrade.

supportsareglass,rubber,plastic,orsuitablycoatedwood.Baremetalshallnotbeused.Specimensshallpreferablybesupportedfromthe5.TestSpecimens

bottomortheside.Slottedwoodenstripsaresuitableforthesupportof atpanels.Suspensionfromglasshooksorwaxedstringmaybeusedaslong5.1Thetypeandnumberoftestspecimenstobeused,asasthespeci edpositionofthespecimensisobtained,ifnecessarybywellasthecriteriafortheevaluationofthetestresults,shallbemeansofsecondarysupportatthebottomofthespecimens.

de nedinthespeci cationscoveringthematerialorproductbeingexposedorshallbemutuallyagreeduponbetweenthe8.SaltSolution

purchaserandtheseller.

8.1Thesaltsolutionshallbepreparedbydissolving561partsbymassofsodiumchloridein95partsofwater6.PreparationofTestSpecimens

conformingtoTypeIVwaterinSpeci cationD1193(except6.1Specimensshallbesuitablycleaned.Thecleaningthatforthispracticelimitsforchloridesandsodiummaybemethodshallbeoptionaldependingonthenatureofthesurfaceignored).Carefulattentionshouldbegiventothechemicalandthecontaminants.Careshallbetakenthatspecimensarecontentofthesalt.Thesaltusedshallbesodiumchloridewithnotrecontaminatedaftercleaningbyexcessiveorcarelessnotmorethan0.3%bymassoftotalimpurities.Halideshandling.

(Bromide,Flu …… 此处隐藏：32383字，全部文档内容请下载后查看。喜欢就下载吧 ……