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Item type:Наукова стаття, Investigation of the Corrosion Resistance of Porous Permeable Materials with Protective Coatings(Cham: Springer, 2022-09-09) Povstyanoy, Oleksandr; Imbirovych, Natalia; Posuvailo, Volodymyr; Zabolotnyi, OlegIt is known that porous permeable materials are subject to corrosion during filtration and cleaning of aggressive media, which leads to their failure. That is why the urgent task is to increase their corrosion resistance. This article is devoted to the study of the corrosion resistance of PPM with combined protective coatings applied to their surface in the form of table salt and hydrochloric acid. The corrosion resistance of PPM with combined protective coatings applied in solutions of sodium chloride and hydrochloric acid has been studied. Com-bined protective coatings were formed by the methods of electric arc spraying and aluminum alloy on the surface of PPM and subsequent plasma electrolytic treatment. As a result, a combined protective coating is formed on the surface of the PPM. Based on potentiodynamic mode established that the corrosion potentials in a solution of table salt move in the positive direction when a combined coating is applied to the surface of the PPM, which indicates a de-crease in the corrosion activity of the surface. The corrosion currents of the combined protective coating for all the studied systems are reduced by 3 or-ders of magnitude, and an increase in the ratio of the cathode to anode current density reduces the rate of corrosion of the coating by another five timesItem type:Наукова стаття, The State of Electrolytic Plasma in Synthesis of Oxide Ceramic Coatings on the Magnesium Basis(Cham: Springer, 2023-05-23) Povstyanoy, Oleksandr; Posuvailo, Volodymyr; Imbirovych, Nataliya; Tkachuk, ValentynaThe basis for determining the density of electrons in plasma is the study of the broadening of spectral lines, which is caused by the linear Shtarkeffect. AQ1 This article demonstrates the applicability of the classical theory of scattering, with the help of which, analyzing the spectral characteristics of spark plasma discharges in the electrochemical system of magnesium-electrolyte, determined that during the synthesis of oxide-ceramic coatings on a magnesium basis in discharge channels for electron density (3.2…3.4)·1022 m−3 and their temperatures (1…1.1)·104 K equilibrium, not degenerate, quasi-ideal plasma is formed with an ionicity (0.02…0.10). This temperature makes conditions for dissociation and ionization of electrolyte components and also ensures high chemical reactivity. At the same time, the speed of the reaction is much higher compared to classical electrochemical methods. The performed calculations provide the possibility of further correct thermodynamic calculation of the concentrations of the reaction products of the synthesis of oxide ceramic coatings in the electrolytic plasma of the magnesium alloy–electrolyte system.