GMW3200-2005 Tin Zinc Plating Material Specification Finish

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1、WORLDWIDEMaterialSpecificationENGINEERINGGMW3200FinishSTANDARDSTinZincPlating2.1ExternalStandards/Specifications.1ScopeASTMF1470SAE/USCAR-5ThisspecificationcoversthebasicrequirementsDIN946SAE/USCAR-7forSn-ZnelectroplateonsteelsubstratesmatingtoISO1463SAE/USCAR-11aluminum,steelandcastironwithprov

2、isionsforISO8227supplementarytreatmentsandcorrosionresis-tance.Thisplatingisintendedforgroundingpur-2.2GMStandards/Specifications.poses.AlloycompositionshallbearangeofGM9540PGMW303475±10%SnandtheremainderZn.Minimumrec-GMW3001GMW3059ommendedplatingthicknessshallbe8µm.Higherorlowerplatingthickness

3、maybespecifiedatthe3Requirementsdiscretionoftheuser.3.1MechanicalRequirements.ThecoatingshallNote:Verificationofalloycompositionshallbebyhavegoodadhesiontobasematerial.ThereshallXRF(X-rayFluorescence)orAA(AtomicAbsorp-benoblisteringorflakingafteranyheattreatmenttion)usingstandardsandprocedureapp

4、rovedbyasdetailedinparagraph3.8.thechemicalsupplierorequipmentmanufacturer.Theadhesionintheasreceivedconditionsshallbe1.1MaterialDescription.Thematerialapprovedcheckedasfollows:tothisspecificationcoversSn-Znelectroplateplusasubsequentprotectivetreatment.Thiscoating30±5minimumat175±5°Cafterwardqu

5、enchingsystemmustbefreeofhexavalentchromiumwithinwater.Blisteringand/orchippingisnotallowed.nohexavalentchromiuminfinalproductpertheElectrolyticallycoatedcomponentsproducedfromrequirementsofGMW3059.GMW3034shallbeaqueoussolutionsmustsatisfythemechanicalusedasarefereetest.propertyrequirementsofthe

6、uncoatedparts.1.2Symbols.Notapplicable.3.2Appearance.Acleancommercialfinishthatis1.3TypicalApplications.Thiscoatingissuitableuniform,tightlyadherent,hardanddryisrequired.forfastenersdesignatedforgroundingpurposes.InRangeofcolor,iridescence,opaqueness,andadditionthiscoatingmaybeusedforfastenersM5

7、sheenarenormallynotcritical.orsmaller.Thiscoatingshallnotbeusedforappli-3.3Thickness.Whenappliedtothreadedprod-cationsexceeding195°Cduringmanufactureorinucts,thecoatingshallnothaveanadverseeffectservice.onnormalinstallationa