Influence of molybdenum and tungsten on the formation of zirconium oxide coatings on a steel base
Bold A. Sassykova L. Fogel L. Vagramyan T. Abrashov A.
January 2021MDPI AG
Coatings
2021#11Issue 11 - 11 pp.
In this paper, we have developed conditions for the deposition of zirconium oxide coatings from solutions containing hexafluorozirconic acid as well as tungsten and molybdenum salts on a steel base. Based on electrochemical studies, it was shown that the addition of tungsten and molybdenum salts to the solution to deposit zirconium oxide coatings led to the inhibition of the anodic process of iron ionization. It was shown that the optimal conditions for the deposition of oxide-zirconium coatings on the surface of steel samples from a solution of 0.2 g/L Zr (IV) + 0.15 g/L W (VI) + 0.1 g/L Mo (VI) were a deposition temperature of 30 °C and time of 10 min. The thickness of the oxide-zirconium coatings formed under these conditions was 64.72 nm, the adhesion value was 3.17 MPa/s, and the corrosion resistance was 26 s according to Akimov’s drop method. The depth of corrosive penetration, determined in the salt fog chamber, did not exceed 2 mm after 240 h of testing, meeting the requirements for adhesive layers under the paintwork.
Adhesion , Cyclic voltammetry , Hexafluorozirconic acid , Molybdenum , Protective ability , Surface structure , Thickness , Tungsten , Zirconium oxide coatings
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D.V. Sokolsky Institute of Fuel, Catalysis and Electrochemistry, JSC, 142, Kunaev Str., Almaty, 050010, Kazakhstan
Faculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, 71, Al-Farabi Ave., Almaty, 050040, Kazakhstan
Department of Innovative Materials and Corrosion Protection, D.I. Mendeleev University of Chemical Technology of Russia, 9, Miusskaya Sq., 125047, Moscow, Russian Federation
D.V. Sokolsky Institute of Fuel
Faculty of Chemistry and Chemical Technology
Department of Innovative Materials and Corrosion Protection
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