The subject of this research is homo- and hetero phase processes of electrochemical synthesis of composite multicomponent systems containing compounds W, Mo on aluminium; W, Mo, V, Cе, Zr, Cu on titanium; Mo on iron; Won silver and deposition of Mo and Co on copper and nickel and alloys based on these metals. The research objective is the development of the theoretical foundations and technological principles of electrochemical application of polyfunctional coatings based on molybdenum and tungsten compounds with controlled properties. The Research methods that have been used are the following: linear and cyclic voltammetry, chronopotentiometry, electrochemical impedance spectroscopy, optical and scanning electron microscopy, gravimetry, X-ray diffraction phase analysis. The results obtained – the controls and kinetic regularities of electrochemical processes with the participation of molybdenum and tungsten oxoanions in aqueous solutions with a wide range of pH were determined. The practical implication of the work is to develop the technological parameters of the electrochemical processes of coating deposition: Co-Mo on M0 and Х80Н20; Al2O3·Mo(W)Oy on D16; Ag2O·WOy on silver; TiOx∙РOy∙W(Мо)Oz, TiOx∙WOy·CeOy∙ZrOz∙CuOn, TiOx∙MoOy on OT4-0; FeOx∙MoOy on 08Х18Н10, which provide controlled inclusion of molybdenum and tungsten into their composition depending on the practical application of deposits to increase hardness, chemical resistance in aggressive environments, anticorrosion, electrical insulation and electro-catalytic properties. The novelty - the hypothesis about the controlling possibility by the electrochemical processes nature, with the participation of molybdenum (VI) and tungsten (VI) ions, associated with the achievements in the study of the forms state of their ions in aqueous solutions is experimentally proved. The implementation level consists of pilot-industrial trials at the NSC “Kharkiv Institute of Physics and Technology”, Public JSC “UKRNAFTOKHIMPROECT”, LLC “Ukrspececco”, Huawei Technologies Co., Ltd. and implementation of the scientific work results at the state enterprise “Malyshev Plant” that proved the efficiency of technologies and a high level of the functional properties of obtained materials. The results of the study have been implemented in the educational process of the Department of Technical Electrochemistry of the NTU “KhPI”. The area of this research application is the technology of electrochemical functional coatings, in research, development and design institutes, and in the training process of the Ukrainian universities.
