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1、DAIMLERCHRYSLERCORPORATIONNO:PS-PLATINGProcessStandardDatePublished:2003-12-10CategoryCode:H-1Change:ZEASLReq.YesRestricted:No***ZINC-MECHANICALANDELECTROPLATED***機械鍍鋅與電鍍鋅1.0GENERAL總則1.1PurposeoftheStandard***本標準的目的***Thisstandardoutlinestheproceduresandrequirementsforelectroplatedzinc,andmec
2、hanicallyplatedzinccoatingsonironandsteelpartsforcorrosionprotection.本標準概述了有關鋼鐵零件的防腐蝕的電鍍鋅和機械鍍鋅涂層的工藝規(guī)程和要求。1.2PurposeoftheProcess***過程的用途***Thisstandardprovidestheproceduresandrequirementsforproducingelectroplatedzincdeposits.PartswithahardnessofHRC32orhigherMUSTbeelectroplatedaccordingtoPS-422
3、0whichrequiresamandatorybakeoperationtorelievehydrogenembrittlement.PS-4220isidenticaltoPS-79respectively,exceptforthemandatorybake.Thisstandardalsocoverstherequirementsformechanicallyplatedzincdeposits.ThefollowingProcessStandards,whichwereformerlyallindividualstandardsandarestillreferencedo
4、ndrawingsassuch,arecoveredbythisonestandard:本標準對生產(chǎn)電鍍鋅層提供了工藝規(guī)程和要求。硬度達到或大于HRC32的零件的電鍍“必須”按照PS-4220，其要求－強制烘培過程以消除氫脆性。除去強制烘培，PS-4220與PS-79完全相同。本標準同樣包含對于機械鍍鋅層的要求。本標準覆蓋，過去所有單獨的和至今圖紙上仍然涉及的以下標準：PS-79Zinc-ElectroplatedPS-4220Zinc-Electroplated-HardenedSteelPartsPS-1536Zinc-MechanicallyPlatedPS-79電鍍鋅PS
5、-4220電鍍鋅-硬化鋼PS-1536機械鍍鋅1.3PartDrawings零件圖紙A.Requirementsshownonthepartdrawingshalltakeprecedenceovertherequirementsspecifiedinthisstandard.B.Unlessotherwisespecifiedonthedrawing,allbrazing,welding,machining,forming,andheattreatmentshallbecompletedbeforepartsorassembliesareplated.Stakingoperat
6、ionsmaybeperformedafterthepartsareplated.C.Thedesireddepositthicknessmustbespecifiedaftertheprocessstandardnumberusinga"code"designation.SeeSection2.3.2.D.Achromate,chemicalsurfacetreatment,PS-1207,isnormallyappliedtothedepositscoveredbythisstandardandshouldbereferencedonthedrawing.SeeSection
7、2.9.E.Thesymbolhasbeensubstitutedforthediamondsymbolinthisstandardtoidentifycriticalbutnon-regulatoryitemsthatrequirecontinuousStatisticalProcessControl(SPC).RefertoPS-7300.F.Thenotion"QARperPS-7300"shallappearinthePartDrawingStandardsB
