Influence of Molybdenum and Tungsten on the Formation of Zirconium Oxide Coatings on a Steel Base

Abstract

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.

Regularities of the Formation of a Green Superhydrophobic Protective Coating on an Aluminum Alloy after Surface Modification with Stearic Acid Solutions

“…A droplet of a solution containing: CuSO 4 •5H 2 O 82 g/L; NaCl 33 g/L; 0.1 N HCl 13 mL/L was applied to a plate, and the time required for the plate color to change from gray to black was measured [39,40].…”

A novel study of tungsten oxide nanocrystallites as fuel additive for diesel oil

“…Because of the large surface area, flexible gap, high chemical stability, nontoxicity, cheapness, abundance, high photocatalytic activity and corrosion resistance properties of WO 3 nano-semiconductors at nano level, numerous articles have been published. It is evident that nano-semiconductors are now being used in different fields due to its unlimited applications include solar cells [10,11], gas sensors [12][13][14], drug delivery [15], fuel additives (current work), dye degradation [16], water treatment [17][18][19], Li-ion batteries [20,21], fuel cells [22,23], supercapacitors [24], corrosion [25], dye sensitized solar cells [26], antimicrobial activity [27], fire packing and resistance [28], cancer cell treatment [29], paint and coating industry [30], bone tissue engineering [31], nano-printing [32], etc. On the basis of these facts, this is being expected that various products based on aforementioned properties will be commercially available soon.…”