在氯化物电解液中Zn_Ni合金共沉积存在着由正常共沉积转变成异常共沉积的Zn转移电流密度 ,该转移电流密度随着Cl-浓度的增加而增加 ,而与溶液pH值基本无关 .这是由于Cl-的存在降低了Ni的析出过电位 ,并对Ni的析出有催化作用之故
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.
[1] TuZhenmi.Thepresentsituationanddevelopmentofelectrodepostitiongzincandzincbasealloys[J].Plating&Finishing;1994,16(3):3.(inChinese).
[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
