ASTM-B488

Designation:B488–01StandardSpecificationforElectrodepositedCoatingsofGoldforEngineeringUses1ThisstandardisissuedunderthefixeddesignationB488;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thisspecificationcoversrequirementsforelectrodepos-itedgoldcoatingsthatcontainnotlessthan99.00mass%goldandthatareusedforengineeringapplications.1.2Specificallyexcludedfromthisspecificationareauto-catalytic,immersion,andvapordepositedgoldcoatings.1.3Goldcoatingsconformingtothisspecificationareem-ployedfortheircorrosionandtarnishresistance(includingresistancetofrettingcorrosionandcatalyticpolymerization),bondability,lowandstablecontactresistance,solderability,andinfraredreflectivity.Severaltypesofcoatings,differingingoldpurityandhardness,arecoveredbythisspecification.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Valuesprovidedinparenthesesareforinformationonly.1.5Thefollowinghazardscaveatpertainsonlytothetestmethodssection,Section9,ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:B32SpecificationforSolderMetal2B183PracticeforPreparationofLow-CarbonSteelforElectroplating3B242PracticeforPreparationofHigh-CarbonSteelforElectroplating3B253GuideforPreparationofAluminumAlloysforElec-troplating3B254PracticeforPreparationofandElectroplatingonStainlessSteel3B281PracticeforPreparationofCopperandCopperBaseAlloysforElectroplatingandConversionCoatings3B322PracticeforCleaningMetalsPriortoElectroplating3B343PracticeforPreparationofNickelforElectroplatingwithNickel3B374TerminologyRelatingtoElectroplating3B481PracticeforPreparationofTitaniumandTitaniumAlloysforElectroplating3B482PracticeforPreparationofTungstenandTungstenAlloysforElectroplating3B487TestMethodforMeasurementofMetalandOxideCoatingThicknessesbyMicroscopicalExaminationofaCrossSection3B489PracticeforBendTestforDuctilityofElectrodepos-itedandAutocatalyticallyDepositedMetalCoatingsonMetals3B499TestMethodforMeasurementofCoatingThick-nessesbytheMagneticMethod:NonmagneticCoatingsonMagneticBasisMetals3B504TestMethodforMeasurementofThicknessofMe-tallicCoatingsbytheCoulometricMethod3B507PracticeforDesignofArticlestoBeElectroplatedonRacks3B542TerminologyRelatingtoElectricalContactsandTheirUse4B558PracticeforPreparationofNickelAlloysforElectro-plating3B567TestMethodforMeasurementofCoatingThicknessbytheBetaBackscatterMethod3B568TestMethodforMeasurementofCoatingThicknessbyX-RaySpectrometry3B571TestMethodsforAdhesionofMetallicCoatings3B578TestMethodforMicrohardnessofElectroplatedCoatings3B602TestMethodforAttributeSamplingofMetallicandInorganicCoatings3B678TestMethodforSolderabilityofMetallicCoatedProducts3B697GuideforSelectionofSamplingPlansforInspectionofElectrodepositedMetallicandInorganicCoatings3B735TestMethodforPorosityinGoldCoatingsonMetalSubstratesbyNitricAcidVapor3B741TestMethodsforPorosityinGoldCoatingsonMetal1ThisspecificationisunderthejurisdictionofASTMCommitteeB08onMetallicandInorganicCoatingsandisthedirectresponsibilityofSubcommitteeB08.08onEngineeringCoatings.CurrenteditionapprovedOct.10,2001.PublishedOctober2001.OriginallypublishedasB488–68.LastpreviouseditionB488–95.2AnnualBookofASTMStandards,Vol02.04.3AnnualBookofASTMStandards,Vol02.05.4AnnualBookofASTMStandards,Vol03.04.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.SubstratesbyPaperElectrography3B748TestMethodforMeasurementofThicknessofMe-tallicCoatingsbyMeasurementofCrossSectionwithaScanningElectronMicroscope(SEM)3B762MethodofVariablesSamplingofMetallicandInor-ganicCoatings3B765GuideforSelectionofPorosityTestsforElectrode-positsandRelatedMetallicCoatings3B799TestMethodforPorosityinGoldandPalladiumCoatingsbySulfurousAcid/Sulfur-DioxideVapor4B809TestMethodforPorosityinMetallicCoatingsbyHumidSulfurVapor(Flowers-of-Sulfur)3D509MethodofSamplingandGradingRosin5D1125TestMethodsforElectricalConductivityandRe-sistivityofWater6D3951PracticeforCommercialPackaging7F390TestMethodforSheetResistanceofThinMetallicFilmswithaCollinearFour-ProbeArray82.2U.S.GovernmentStandards:MIL-G-45204GoldPlating,Electrodeposited9MIL-STD-1916DODPreferredMethodsforAcceptanceofProduct92.3ANSI/ASQCStandardsANSI/ASQCZ1.4-1993SamplingProceduresandTablesforInspectionbyAttributes103.Terminology3.1Definitions—Fordefinitionsoftermsusedinthisspeci-ficationrefertoTerminologiesB374orB542.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1significantsurfaces—definedasthosenormallyvis-ible(directlyorbyreflection)oressentialtotheserviceabilityorfunctionofthearticle.Canbethesourceofcorrosionproductsortarnis