STUDY OF THE INFLUENCE OF pH ON THE ELECTROCRYSTALLIZATION OF ZINC

The influence of pH value of the electrolyte solution on the zinc electroplating process was studied by means of cyclic voltammetry and chronoamperometry approaches. The results shown that, under this experimental conditions and at high overpotentials, the nucleation of zinc is instantaneous, and the nuclear densities N increase with the overpotentials. While at low potentials, no distinguished nucleation current can be observed. High pH promotes the deposition either by drifting the initial depositing potential positively, or by increasing the depositing current through the change of the total charge of the adsorption process Qads, i.e., thevstructure of electrochemical double layer.

作 者： Z.Zhang W.H.Leng J.Q.Zhang   作者單位： Z.Zhang,W.H.Leng(Department of Chemistry, Zhejiang University, Hangzhou 310027, Ghina)

J.Q.Zhang(Department of Chemistry, Zhejiang University, Hangzhou 310027, Ghina;State Key Laboratory for Corrosion and Protection, Institute of Metal Reseach, The Chinese Academy of Sciences, Shenyang 110016, China) 

刊 名： 金屬學報（英文版）  ISTIC EI 英文刊名： ACTA METALLURGICA SINICA  年，卷(期)： 2005 18(4)  分類號： O6  關(guān)鍵詞： zinc electroplating   nucleation   growth   mechanism  

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