工艺流程(锡。镍。铬(英文版).doc

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1、MadebyCheckedbyAprovedby譚遠望Sn/Cr,Ni/CrplattingflowchartH2SO4100-150g/L50-60℃Surface-activeagent4ml/l1.5-2.5minAlkalinedegreasingpowder30-50g/l50-60℃2-3minStrikecuH2SO415-20ml/l0.5-1.5℃NiSO427-32g/lNH4Cl25-35g/lNaH2PO28-15g/l30-40℃5-10minSn：70-100ml/lNi：375-420ml/lAdditionagent：30-60ml/lTempera

2、ture：25-40℃PH：8.0-9.50.2-1.5A/d㎡1.5minPH：8.5-9.5CountercurrentrinsingCountercurrentrinsingCountercurrentrinsingCountercurrentrinsingCountercurrentrinsingCountercurrentrinsingCountercurrentrinsingCountercurrentrinsingCountercurrentrinsingAlkalinedegreasingBrightenernickel.CPHCl80-120ml/lSnCl21-

3、5g/lindoortemperature1.5-3.0minPdCl20.15-0.3g/lNiCl2：150-210g/l50-70℃Sn：55-80ml/lCo：15ml/lAdditionagent：135ml/l0.5-1min0.1-4.4A/d㎡PH：4.7-6.0NiSO4250-280g/lNiCl245-60g/lH3BO345-60g/lPH4.0-4.650-60℃4-6min2-8A/d㎡NiSO4230-250g/lNiCl245-60g/lH3BO345-60g/lPH4.0-4.650-60℃4-6min2-8A/d㎡Cu2P2O725-35g/l4

4、5-55℃K4P2O7190-240g/l2-3minCPHCl30-50ml/l45-60℃1.5-3.0minCPHCl40-60ml/l1-2minCrO3410-430g/l65-70℃H2SO4400-420g/l8-15minSemi-brightnickelChemistrynickelSn/CrNi/CrActivationActivationCatalystModeraterecoverPicklingAciddipping