Corrosion resistance, wear resistance and tribocorrosion of Ni–Mo–B electrodeposited coatings

Keywords

Ni–Mo–B coating, electrochemical deposition, corrosion resistance, micro¬hardness, micromechanical properties.

Cite as

Halaichak S. A., Korniy S. A., Zakiev V. I., Vynar V. A., Danilchuk M. V., Chuchman M. R., and Mardarevych R. S. Corrosion resistance, wear resistance and tribocorrosion of Ni–Mo–B electrodeposited coatings. Physicochemical Mechanics of Materials. 2025. 61(5), 012-021.

https://doi.org/10.15407/pcmm2025.05.012

Abstract

Corrosion-resistant electrodeposited Ni–Mo–B coatings of various chemical compositions were obtained from a self-regulating electrolyte, and their micromechanical, tribological, and tribocorrosion properties were investigated. The influence of electrodeposition parameters on the composition, structure, and characteristics of Ni–Mo–B coatings was studied. They exhibit a fine-grained structure with 8–27 wt% Mo and 1.3–3.39 wt% B, free of pores and cracks. It was established that an increase in molybdenum content enhances the corrosion resistance of the coatings in chloride-containing media. The micromechanical properties of coatings with 8 and 16 wt% Mo were examined using scratch testing and dynamic nanoindentation, while their tribological and tribocorrosion characteristics were evaluated under a “plane–ball” configuration in air and in 3% NaCl solution, respectively. It was revealed that coatings with 8 wt% Mo perform better under dry friction conditions, whereas coatings with 16 wt% Mo are more effective under tribocorrosion loading. Ni–Mo–B coatings can serve as an environmentally friendly alternative to hard chromium.

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