Maizelis A. Electrochemical functional coatings with micro- and nanosized Cu, Sn, Ni, Zn-containing layers of controlled phase composition

Object of research: electrochemical processes of formation of coatings consisting of micro- and nanosized Cu, Sn, Ni, Zn-containing layers of controlled phase composition. The aim of the study is to develop the theoretical foundations of technologies for the electrochemical formation of protective coatings with nanoscale layers of Cu-Sn, Cu-Zn and Zn-Ni alloys and catalytically active surface materials with nano- and microscale layers of alloys with the inclusion of Cu, Sn, Ni and Zn hydroxo compounds with specified physical and chemical properties. Methods: chronoamperometry, chronopotentiometry, cyclic linear and nonlinear voltammetry, striping voltammetry, rotating disk electrode, X-ray fluorescence, X-ray phase analysis, scanning electron and optical microscopy, Vickers method. Theoretical and practical results: the scientific and applied problem of creating the theoretical foundations of technologies for the electrochemical formation of protective and functional coatings with controlled physicochemical properties by sequential deposition of layers of alloys of different phase composition in electrolytes based on polyligand systems are solved. Scientific novelty: electrochemical formation of coatings are proposed by periodically changing the current density or potential in polyligand electrolytes with alternating layers of different phase composition, which is the main of the formulated principles for the formation of coatings with increased protective and functional properties in comparison with existing materials, e.g. protective coatings with nanoscale layers of different phase composition, as well as electrocatalytic coatings in the reactions of hydrogen evolution and oxidation of organic substances with micro-fine layers of different phase composition. Degree of implementation: the results were implemented in the software of the MTech PGP-550S potentiostat (Lviv), and recommended for implementation by the VA Malyshev Plant and State Scientific and Production Enterprise "Ob’jednannja Komunar" (Kharkov). Application area: mechanical engineering, chemical industry; research institutes and educational process.