Electrochemical behaviors of Zn-Fe alloy and Zn-Fe-TiO₂ composite electrodeposition

来源期刊：中南大学学报(英文版)2003年第3期

论文作者：王云燕 彭文杰 柴立元 舒余德

文章页码：183 - 189

Key words：Zn-Fe alloy; electrodeposition; Zn-Fe-TiO₂ composite; electrochemical behavior

Abstract: Electrochemical behaviors of Zn-Fe alloy and Zn-Fe-TiO₂ composite electrodeposition in alkaline zincate solutions were studieci respectively by the methods of linear potential sweep and cyclic voltammetry. From the results it can be conctuded that Zn shows under potential deposition, Zn-Fe alloy codeposition is anomalous codeposition and Zn-Fe alloy cathode potarization is increased with the introduction of additive. From the view point of electrochemistry, the reasons that the content of Fe in the Zn-Fe coating changes with the composition of the electrolyte and the process conditions altering and the relationship between the content of Fe and the appearance of the coatingare interpreted. The cathode polarization of Zn-Fe alloy cocleposition is enhanced obviously with addition of additive.In the course of composite electrodeposition, TiO₂ has less promotion to electrodeposition of zinc ions than to iron ions. while the eiectrodeposition of iron ions improves the content of TiO₂ in composite coating, which is in agreement with the results of process experiments.