The protection of carbon steel against carbon dioxide corrosion by an inhibitor, which is alkylamines in an organic solvent, in model stratum waters MW3 and MW4 was studied using gravimetry, potentiodynamic polarization and impedance spectroscopy methods. The more salt-saturated environment MW4+CO₂ is characterized by lower corrosion rates than the environment MW3+CO₂. With the corrosion rate in the absence of inhibitor of 0.1688 g/(m²∙h) in the MW4 environment, the presence of 300 mg/L of inhibitor leads to its decrease to 0.0485 g/(m²·h) (Z =71%), according to gravimetric daily tests at room temperature. In the MW3 environment under similar conditions, the decrease in the corrosion rate is less (0.0723 g/(m²·h) (Z = 62%) against 0.1894 g/(m²·h) in the absence of inhibitor). At 80 °C and under dynamic conditions in the presence of 10% hydrocarbon phase, the corrosion rates are higher and the protective effect values (Z,%) of the inhibitor are higher. Using potentiodynamic polarization and impedance spectroscopy methods, it was shown that the inhibitor slows down the anodic process of steel corrosion by adsorbing on the surface. At the same time, the inhibitor slows down the diffusion of hydrogen formed during corrosion into the metal.

The results of laboratory experiments of spindle oil AU with a new anticorrosive additive «Rosoil-Akor» and commercial additive AKOR-1 in aggressive environments are presented. The experiments were conducted using a standardized method in a salt fog chamber and an alternative method involving exposure to seawater. It is shown that samples of AU oil with a new additive are superior to samples with a commercial additive in terms of protective ability assessment criteria.

A scientifically substantiated forecast is given for the possibility of using a sealed copper-aluminum circuit for thermal stabilization of multipurpose detectors using distilled water as a coolant. Model installations for continuous water pumping through copper, aluminum, and mixed copper-aluminum circuits have been developed and assembled to compare the corrosion resistance of various materials. A technique for full-scale corrosion tests of closed water cooling circuits based on changes in the specific electrical conductivity of the coolant over different time intervals has been proposed for the first time. Using X-ray phase analysis, it has been established that aluminum hydroxide is the product of aluminum corrosion. Based on changes in the surface morphology of copper and aluminum revealed by scanning electron microscopy, an assumption has been made about the slow dissolution of these metals during long-term pumping of distilled water through them: with the formation of a strong but not continuous film on the surface of aluminum, and by smoothing the microrelief of the copper surface. The comparison of the change in water electrical conductivity from the time of its continuous pumping through copper, aluminum and copper-aluminum circuits for 100 days, as well as the extrapolation of the straight-line sections of the dependence of ρ on t to 365 days showed that, provided there is no direct contact between copper and aluminum, a slight increase in water electrical conductivity is observed when using Al (ρ =19 μS/cm), Cu (ρ =24 μS/cm) and mixed Cu–Al (ρ =25 μS/cm) circuits.

This article presents the results of research aimed at developing an advanced technology for synthesizing highly porous copper foam materials with a controlled structure. The primary focus was on selecting optimal electrolyte compositions and electrochemical deposition parameters to produce materials with tailored morphological and functional characteristics. Various electrolyte formulations were investigated, including copper salts, acid and buffer additives, as well as modifiers affecting deposition kinetics and the porosity of the resulting structures. Experimental studies identified key electrodeposition parameters – such as current density, process duration – that significantly influence pore size, distribution, and mechanical strength. The obtained copper foam materials exhibit a high specific surface area and an open porous structure, making them suitable for use as efficient adsorbents and catalyst supports. Their advantages include high chemical stability, good thermal conductivity, and reusability, which are particularly important for industrial applications. The developed technology enables the production of materials with adjustable properties that meet the requirements for functional porous materials in the chemical industry, energy sector, and environmental applications. Further research may focus on optimizing material composition and structure to expand their practical use.

The influence of the composition of electrolytes on the content of boron and aluminum in composite electrochemical coatings Ni-B, respectively, as promising high-energy materials, has been studied. The highenergy properties of Ni-B coatings are due to the reaction of formation of nickel boride Ni₃B during the interaction of nickel and boron with the release of a large amount of thermal energy. The optimal ratio of the components in the Ni-B composite is 75 %_at. nickel to 25 %_at. boron. It can be concluded that the electrolyte based on the deep eutectic solvent mixture of choline chloride ethylene glycol is highly effective in obtaining high-energy composites Ni-B. The use of this electrolyte allows for obtaining the optimal ratio of nickel and boron, and, consequently, the greatest completeness of the reaction when using this CEP as high-energy coatings.