Effect of Nickel and Molybdenum on the Conditions of Oxide-zirconium Coatings on Steel Base

Abstract

In this paper, we developed the conditions for the deposition of zirconium oxide coatings from solutions containing hexafluorozirconic acid, nickel and molybdenum salts on a steel base. Optimal concentrations of nickel and molybdenum were determined to obtain oxide-zirconium coatings used as adsorption layers for paint coatings. The effect of temperature, time and subse-quent heat treatment on the protective anticorrosive and adhesive characteristics of oxide-zirconium coatings has been established. It is shown that the formed oxide-zirconium coating are nano scale size. It is established that the corrosion resistance of the investigated coatings in the temperature range 3040°C is in agreement with their adhesion strength. On the basis of electro-chemical studies, it was shown that the addition of hexafluorozirconic acid to nickel and molybdenum salts leads to inhibition of iron ionization and an increase in the corrosion resistance of the formed coating.