Sachanova Y. Electrochemical forming of Fe–Co–Mo(MoOx) alloys and composites coatings

The subject of this research is Electrodeposition of composite Fe–Co–MoOx and metal Fe–Co–Mo coatings from complex citrate electrolytes and technological process parameters. The research objective is the development of electrochemical technology of coatings of ternary alloys and composites of ferum-cobalt-molybdenum system with high level of functional properties. Research methods ‒ linear and cyclic voltammetry, X-ray fluorescence and energy-dispersive, X-ray spectroscopy, X-ray diffraction analysis, electrode impedance spectroscopy, atomic force microscopy. As the result of theoretical and bottom line it has been established. The hypothesis about the incorporation of oxides of refractory components as intermediates of electrode reactions into the composition of a metal matrix was proved experimentally. The variation schemes of electrochemical processes were suggested and these allow for the deposition of Fe-Co-Mo(МоOx) coatings and composits depending on their practical application with their high functional properties. The novelty. The mechanism of cathodic deposition of Fe–Co–Mo system coverings as electrodeposition and so adsorbed hydrogen ad-atoms by spillover effect is established. Synthesis of composite coatings occurs in the process of stationary electrolysis without introducing another phase into the electrolyte. The coatings obtained from these electrolytes have corrosion resistance, catalytic and sensory properties, as well as microhardness, which is 2÷2.5 times higher than the value of alloying components and reaches 570 MN/m2 according by Vickers. The software module of technological process is offered. The realization degree consist of the experimental items with developed coatings and electrolyte compositions pilot test in PJSC «UKRNDICHIMMASH and at the Metrology Center of Military Standards of the Armed Forces of Ukraine. The branch of this research application is the technical process of electrochemical production, Research Studies Institutes and а training process.