Designation:B825−13StandardTestMethodforCoulometricReductionofSurfaceFilmsonMetallicTestSamples1ThisstandardisissuedunderthefixeddesignationB825;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversproceduresandequipmentfordeterminingtherelativebuildupofcorrosionandtarnishfilms(includingoxides)onmetalsurfacesbytheconstant-currentcoulometrictechnique,alsoknownasthecathodicreductionmethod.1.2Thistestmethodisdesignedprimarilytodeterminetherelativequantitiesoftarnishfilmsoncontrolcouponsthatresultfromgaseousenvironmentaltests,particularlywhenthelatterareusedfortestingcomponentsorsystemscontainingelectricalcontactsusedincustomerproductenvironments.1.3Thistestmethodmayalsobeusedtoevaluatetestsamplesthathavebeenexposedtoindoorindustriallocationsorotherspecificapplicationenvironments.(See4.6forlimi-tations.)1.4Thistestmethodhasbeendemonstratedtobeapplicableparticularlytocopperandsilvertestsamples(see(1)).2Othermetalsrequirefurtherstudytoprovetheirapplicabilitywithinthescopeofthistestmethod.1.5ThevaluesstatedinSIunitsarethepreferredunits.Thevaluesprovidedinparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.ItistheresponsibilityoftheuserofthisstandardtobecomefamiliarwithallhazardsincludingthoseidentifiedintheappropriateMaterialSafetyDataSheet(MSDS)forthisproduct/materialasprovidedbythemanufacturer,toestablishappropriatesafetyandhealthpractices,anddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3B808TestMethodforMonitoringofAtmosphericCorrosionChambersbyQuartzCrystalMicrobalancesB809TestMethodforPorosityinMetallicCoatingsbyHumidSulfurVapor(“Flowers-of-Sulfur”)B810TestMethodforCalibrationofAtmosphericCorrosionTestChambersbyCh...
