In this work, different cationic surfactants with various aliphatic and aromatic ammonium cations were used to prepare inhibitor coatings and were characterized by different techniques such as IR spectroscopy and NMR. The inhibitor coatings were prepared by electrografting on the steel surface and their anticorrosion properties were evaluated in different media (HCl, H₂SO₄ and NaCl solutions). The electrochemical potentiodynamic polarization technique was used to study the inhibition efficiency of the prepared coatings. The dependence of the wetting properties of the electrografted layer and its homogeneity on the molecular structure of the prepared surfactants was studied. Particular attention was paid to the relationship between the properties of these surfactants in terms of critical micellar concentration, packing and wetting, and the anti-corrosion efficiency of their coatings. In this paper, we discuss the synergistic inhibition effect and the anticorrosion efficiency.

The model described pertains to non-ferrous metal metallurgy, specifically the electrochemical synthesis of high-purity, fine-dispersed zinc powders. The properties of zinc powders obtained via electrolytic methods in a 10% sodium hydroxide solution, after leaching the active mass of spent manganese-zinc chemical current sources, have been studied. Cathodic polarization curves during the electrochemical deposition of zinc powders were examined both in steady-state mode and under an ultrasonic field, with the optimal current density set at 5 A/dm². Zinc powder electroextraction was conducted in both stationary mode with a current density of 5 A/dm² and in an ultrasonic field with a current density of 7 A/dm². Optimal parameters such as electrolytic cell voltage, zinc Zn²⁺ ion concentration, and current yield were monitored and determined during electrolysis. Based on the current yield and the concentration of Zn²⁺ ions in the solution, the ultrasonic deposition mode proved to be preferable, with a current yield of 42% compared to 30% in the stationary mode. The zinc powders obtained were examined using an electron microscope, revealing granules of high dispersion. These powders exhibit anticorrosive, electrical, and thermoelectric properties. The physical and chemical characteristics of these zinc powders, derived from the leaching of active masses in spent manganese-zinc current sources, make them suitable for creating light-emitting devices such as lasers and LEDs. Additionally, when alloyed with rare metals, these powders' semiconductor properties broaden their application in the electronics industry.

Multifunctional coatings based on Sn-Ni materials with and without titanium oxide nanoparticles (TiO₂NPs) incorporation were prepared using the electrochemical deposition technique at 70 °C. TiO₂NPs were dispersed in the electrolyte bath, and their influence on the surface texture, crystalline phase, and properties was investigated. Various techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray microanalysis (EDX) were used to characterize the prepared coatings. The formation mechanism of the deposited coatings has been demonstrated to be consistent with the electrochemical behavior of instantaneous growth, and the three-dimensional growth is controlled by diffusion phenomena. The anticorrosion effectiveness of the coatings was assessed using potentiodynamic polarization curves and electrochemical impedance spectroscopy in an artificial sweat medium, while the bactericidal activity of the composite coatings (the ability to induce cell death) was evaluated in accordance with the ISO 27447:2019 test. The influence of TiO₂NPs at a low concentration of 1 g/L on the composition, structure, and properties of the deposited coatings was demonstrated. Particular attention was paid to the relationship between the anticorrosive and bactericidal properties of the coatings and their structure composition and wetting properties. The synergistic effect of chemical composition and surface-wetting properties has been demonstrated to enhance the anticorrosive and bactericidal properties of the prepared coatings.

Multifunctional coatings based on Sn-Ni materials with and without titanium oxide nanoparticles (TiO2NPs) incorporation were prepared using the electrochemical deposition technique at 70°C. TiO2NPs were dispersed in the electrolyte bath, and their influence on both surface texture, crystalline phase, and properties was investigated. Various techniques such as X-ray phase analysis (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray microanalysis (EDX) were used to characterize the prepared coatings. The anti-corrosion effectiveness of the coatings was assessed using potentiodynamic polarization curves and electrochemical impedance spectroscopy in an artificial sweat medium, while the bactericidal activity of the composite coatings (the ability to induce cell death) was evaluated in accordance with ISO 27447:2009 test. The influence of the TiO2NPs on the composition, structure and properties of the deposited coatings was established. Particular attention was paid to the relationship between the anticorrosive and bactericidal properties of the coatings and their structure and composition. The synergistic effect of the various properties was investigated and discussed.

The properties of manganese dioxide obtained by electrolytic process in 10% sulphuric acid leaching of the active mass of spent manganese-zinc chemical current sources were investigated. The electrolytically produced manganese dioxide has different labels such as EDM-1 and EDM-2, which may have anti-corrosion, magnetic, ferromagnetic, electrical, thermoelectric properties, as well as heat resistance and heat resistance. From the images obtained by electron microscope, we determined the size of microcrystals of grains, and also found that the size of manganese dioxide grains does not depend on the change of current density and is within the range of 20 to 30 microns. Based on the current yields of manganese dioxide EDM-1 obtained under stationary conditions of electrolysis, it is preferable to use 10% sulphuric acid leaching electrolyte at current density 0.15 A/dm2 and at temperature 40 0C, and for manganese dioxide EDM-2 obtained also by electrolytic method it is preferable to use 10% sul-phuric acid leaching electrolyte at current density 0.5 A/dm2 and at temperature 30 0C.