BS 3382-1961 Specification for Electroplated coati

BRITISHSTANDARDBS3382:Parts1&2:1961IncorporatingAmendmentsNo.1,2and3SpecificationforElectroplatedcoatingsonthreadedcomponents—Part1:CadmiumonSteelComponents—Part2:ZinconSteelComponentsUDC621.793:621.882:669.738:669.587Licensedcopy:PONTYPRIDDCOLLEGE,16/11/2006,UncontrolledCopy,©BSIBS3382:1961ThisBritishStandard,havingbeenapprovedbytheMechanicalEngineeringIndustryStandardsCommitteeandendorsedbytheChairmanoftheEngineeringDivisionalCouncil,waspublishedundertheauthorityoftheGeneralCouncilon12May1961©BSI03-2000ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferenceMEE/1andMEE/1/19DraftsforcommentCY(MEE)4811andCZ(MEE)2546ISBN0580031489Co-operatingorganizationsTheMechanicalEngineeringIndustryStandardsCommittee,underwhosesupervisionthisBritishStandardwasprepared,consistsofrepresentativesfromthefollowingGovernmentdepartmentsandscientificandindustrialorganizations:Admiralty*GasCouncilAirMinistry*HighCommissionofIndiaAssociatedOffices’TechnicalCommitteeInstituteofMarineEngineersAssociationofConsultingEngineersInstituteofPetroleum(Incorporated)InstitutionofCivilEngineersBritishChemicalPlantManufacturers’InstitutionofGasEngineersAssociationInstitutionofHeatingandVentilatingBritishCompressedAirSocietyEngineersBritishElectricalandAlliedManufacturers’InstitutionofMechanicalEngineers*Association*InstitutionofMechanicalBritishEngineers’Association*Engineers(AutomobileDivision)BritishGearManufacturers’AssociationInstitutionofProductionEngineers*BritishInternalCombustionEngineLocomotiveandAlliedManufacturers’Manufacturers’AssociationAssociationofGreatBritain*BritishIronandSteelFederationMachineToolTradesAssociationBritishRailways,TheBritishTransportMinistryofLabour(FactoryInspectorate)Commission*MinistryofPowerCrownAgentsforOverseaGovernmentsandMinistryofTransportAdministrationsMinistryofWorksD.S.I.R.—NationalEngineeringLaboratory*NationalCoalBoardElectricityCouncil,TheGeneratingBoardNationalPhysicalLaboratory(D.S.I.R.)*andtheAreaBoardsinEnglandandWalesRadioIndustryCouncil*EngineeringEquipmentUsers’Association*WarOffice*TheGovernmentdepartmentsandscientificandindustrialorganizationsmarkedwithanasteriskintheabovelist,togetherwiththefollowing,weredirectlyrepresentedontheCommitteeentrustedwiththepreparationofthisstandard:AgriculturalEngineersAssociationRadioandElectronicComponentBritishBolt,Nut,ScrewandRivetManufacturersFederationFederationScientificInstrumentManufacturers’BritishNon-ferrousMetalsResearchAssociationAssociationScrewThreadToolManufacturers’CouncilofBritishManufacturersofAssociationPetroleumEquipmentSocietyofBritishAircraftConstructorsElectronicEngineeringAssociationSocietyofMotorManufacturersandTradersGaugeandToolMakers’AssociationLtd.InstituteofMetalFinishingTelecommunicationEngineeringandMinistryofAviationManufacturingAssociationNationalAssociationofMarineEnginebuildersIndividualManufacturersAmendmentsissuedsincepublicationAmd.No.DateofissueComments6279November1967926March19728232November1994IndicatedbyasidelineinthemarginLicensedcopy:PONTYPRIDDCOLLEGE,16/11/2006,UncontrolledCopy,©BSIBS3382:1961©BSI03-2000iContentsPageCo-operatingorganizationsInsidefrontcoverForewordiiIntroductorynotes11Scope32Definitions33Inspection34Screwthreaddimensions4Part1:Cadmiumplating(brightordull)onsteelcomponents5Resistancetocorrosion46Purity47Adhesion48Porosity49Reductionofhydrogenembrittlement410Finishandappearanceofplatedsurfaces511Platingthickness512Passivation6Part2:Zincplating(brightordull)forsteelcomponents13Resistancetocorrosion614Purity615Reductionofhydrogenembrittlement616Finishandappearanceofplatedsurfaces617Platingthickness619Passivation7AppendixAPassivationtreatment8AppendixB“Stripandweigh”methodforthedeterminationofgroupandsampleaverageplatingthicknesses9AppendixCDeterminationofthethicknessofcadmiumplatingbytheClarke“timeofgassing”test9AppendixDNotesonsurfaceareasofboltsscrewsandnuts10AppendixEExamplesofcalculationsofdepositthicknessesonplatedthreadedshanks12Figure1—Probablefrequencydistributionofthicknessinabarrelload2Figure2—Curveofdeterminationofaveragethicknessofcadmiumcoatings10Figure3—Constituentsurfaceareasofascreworbolt11Table1—Platingthickness5Table1A—Platingthickness(millimetredimensions)5Table2—Screwsandbolts—B.S.W.andB.S.F.threads13Table3—Screwsandbolts—UNCandUNFthreads14Table4—Screwsandbolts—B.A.threads15Table5—Screwsandbolts—B.S.C.andB.S.P.threads15Table6—TabledeletedTable7—Nuts—B.S.W.andB.S.F.threads16Table8—Nuts—B.A.threads16Table9—Nuts—UNCandUNFthreads17Table10—TabledeletedLicensedcopy:PONTYPRIDDCOLLEGE,16/11/2006,UncontrolledCopy,©BSIBS3382:1961ii©BSI03-2000ForewordThisstandardsmakesreferencetothefollowingBritishStandards:BS57,B.A.screws,bolts,nutsandplainwashers.BS84,ParallelscrewthreadsofWhitworthform.BS93,BritishAssociation(B.A.)screwthreadswithtolerancesforsizes0B.A.to16B.A.BS450,Machinescrewsandmachinescrewnuts(B.S.W.andB.S.F.threads).BS811,Cyclethreads.BS919,Screwgaugelimitsandtolerances.BS1083,Precisionhexagonbolts,screws,nutsandplainwashers.BS1210,Woodscrews.BS1580,Unifiedscrewth