Petrenko L. The Kinetics of Anodic Dissolution and Passivation of Zinc Alloyed Coatings

The object of research is electrochemical processes on the surface of zinc alloys and metals included in their compositions at the anodic polarization in the electrolyte solutions. The research objective is to identify linkages between the kinetics of the initial stage of anodic processes on the electrolytic zinc alloys and their phase composition. Methods of research are voltammetry with linear potential scan, cyclic voltammetry, titration and spectrophotometry analysis, fluorescent spectroscopy, scanning electron microscopy, X-ray diffraction. It has been provided novel mathematical models describing the kinetics of the initial stage of anodic dissolution of different phase composition electrolytic zinc alloys. It was revealed the character of variation of thermodynamic and kinetic parameters of the initial stages of anodic dissolution of zinc alloy components due to alloy formation. It was found the relationship between the electrolytic zinc alloys phase composition and their anode current-voltage dependencies in alkaline solutions. It was shown the possibility of electrolytic zinc alloys phase identification on the basis of their anode current-voltage dependencies in alkaline solutions. The new phase of hexagonal structure was detected in the content of the electrolytic Zn-Fe alloys that is absent in the equilibrium phase diagram. It is planned to implement the results of research. The field of application: electrodeposition of metals and alloys and determination of their functional compounds.