Control-Steps and Influence Factors of SiO2 Electrodeposition Process with Zn Coatings
In order to explore electrodeposition mechanism of composite plating, the effect of SiO2 particle concentration in the electrolyte on the component of Zn-SiO2 coatings was studied, and the control steps of composite electrodeposition were analysed. The results show that two-step adsorption of particles on the cathode proposed by Guglielmi also occurs during Zn-SiO2 composite electrodepositing process. When SiO2 particle concentration added in sulfate electrolyte is more than 10 g/L, the control-step of the electrodepositing process will turn from loose adsorption to strong adsorption, while the turning point of particle concentration in chloride plating system is 4 g/L. Through comparing and analysing the relationship between , and c, it is testified that Guglielmi model only can be effective when composite electrodepositing process is controlled by strong adsorption, while due to hydromechanical effect, it is not available when loose adsorption is dominant, and the critical concentration is not fixed in different plating system.
Zhengyi Jiang and Chunliang Zhang
Y. Y. Fan and D. H. Chen, "Control-Steps and Influence Factors of SiO2 Electrodeposition Process with Zn Coatings", Advanced Materials Research, Vols. 97-101, pp. 1416-1419, 2010