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Corresponding Author

Ren_he YIN

Abstract

There exists a transition current density of Zn when the normal co_deposition of Zn_Ni alloys at chloride baths turns to anomalous type.The value increases with Cl - concentration, but is independent of pH, this is because the existence of Cl - decreases the evolution overpotential of Ni metal and has a catalytic effect on it.

Keywords

Zn_Ni alloys, Transition current density, Anomalous co_deposition, Catalytic effect

Publication Date

2002-05-28

Online Available Date

2002-05-28

Revised Date

2002-05-28

Received Date

2002-05-28

References

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[2] LiHuawei.LiuYiuli.CheChenhuan.Currentstatusofsystemzincalloysplating[J].Electroplating&Protec tionControl,1998,101:16.(inChinese).

[3] AtsuyoshiShibuya,TatsuoK ,KimitakeK ,KohjiN .Corrosionsurfacetreatment[J].J .Iron.Steel.Inst.Japan,1980,66:771.

[4] YojiImai.TsuyukiWatanabe.MitsuoKurachi.ElectrodepositionofNi_Znalloysandtheirthermodynamice valuation[J].ElectrochemJapan,1978,46:202.

[5] FuKushimaH ,AklyamaTLee,JYamaguchiM ,HigashiK .MechanismoftheelectrodepositionofzincwithIron_groupmetalsfromsulfatebaths[J].Trans.Japan.Inst.Metals.,1983,24:125

[6] MitsuhiroYasuda,IzumiOhno,ShiroH .Roleofchlorideiononnickelplating[J].J .Surf.Finish.Soc.Japan,1990,41:312

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