Preparation of Electrochemical Ni–Mo Coatings from Self-Regulating Electrolytes

Ni–Mo coatings on steel substrates made of complex self-regulating electrolytes were obtained by the electrodeposition method. The surface morphology and elemental composition of the obtained coatings were determined by the methods of electron microscopy and energy dispersive analysis. The maximum molybdenum content (25.26 mass%) was obtained at a deposition current density of 0.5 A/ dm² (pH 9.2, 300 rpm, 22±2°C). The thickness of such coatings is 15–20 μm. The microhardness of coatings increases with an increase in the molybdenum content. The proposed electrolyte is characterized by high stability and is technologically and environmentally friendly.