Due to the high toxicity of chromating solutions, which include highly toxic hexavalent chromium compounds, and the conversion coatings formed in them, laws have been adopted in most countries restricting or completely prohibiting the use of Cr(VI) compounds in mechanical engineering and electronics products. This publication is devoted to the development of the process of applying a protective sol-gel zirconiumcontaining coating to the surface of the aluminum alloy AA5056. The optimization of the process parameters for the deposition of a functional sol-gel coating was carried out, the physicochemical and mechanical properties of the coating, which could become an alternative to toxic chromate coatings, were investigated. During the work, it was found that the Zr-containing sol-gel coating is comparable in abrasion resistance to chromate films. The results of polarization measurements showed that the application of a multilayer sol-gel coating improves its protective ability. The increase in protective ability is also confirmed by exposure in the salt mist chamber. The time until the first signs of corrosion appear is 435 hours.

The protective efficiency of a superhydrophobic (SHP) coating on a steel electrode obtained by electrodeposition of copper and zinc with subsequent treatment in an ethanol solution of myristic acid was studied in a number of environments. The SHP coating is characterized by a contact wetting angle equal to 157±2°. Corrosion tests were carried out gravimetrically under conditions of 100% humidity, distilled water, in the gas and liquid phases of 1 and 3% SO2 solutions, as well as NaCl (50 g/L) and NACE (g/L: NaCl – 5; СH3 COOH - 0,25) in the presence of 1 excess atmosphere of CO2 for 240 h. The superhydrophobic coating exhibits 100% protective effect Z when samples are exposed to 100% humidity and distilled water at a virtually constant value of contact angles. In the gas phase of NaCl + CO2 and NACE + CO2 solutions, the protective effect is 78 and 71% respectively. In the first case, superhydrophobicity is retained, in the second - hydrophobicity, but subsequent exposure to air helps restore superhydrophobicity. After the liquid phase, the coating retains its hydrophobicity, but its superhydrophobicity is not restored when exposed to air. In the gas phase of 1 and 3% SO2 solutions, Z is 94 and 64% respectively. In the first case, the coating retains its superhydrophobicity, while in the second case, it retains its hydrophobicity, which, however, turns into superhydrophobicity when exposed to air. Polarization and impedance measurements in a NaCl solution for 168 hours showed that the presence of the SHP coating on the steel electrode causes a slowdown in the anodic process on the electrode compared to an unprotected electrode. The Z value of the coating at the initial moment is close to 90% and decreases over time, reaching 70% after 168 hours.

Thioamides are widely used in the chemical industry, engineering and agriculture due to their reactivity and chemical properties. However, these compounds have been little studied as additives used to improve the quality of oils used in machines and mechanisms. For this purpose, scientific research has been conducted in the direction of studying the improvement of the anti-corrosion and anti-wear properties of n-chlorophenylthioacetamides as additives to lubricating oils. Due to their chemical properties and reactivity, thioamides are used in the chemical industry, engineering, agriculture, etc. They are an indispensable raw material in the production of rubber as vulcanization accelerators, flotation reagents and components of preservative liquids. Studies have shown that thioamides, such as n-chlorophenylthioacetamide, have been little studied as additives to improve the quality of lubricating, hydraulic and mineral oils of petroleum origin. The article is devoted to the study of the properties of thioamide compounds as additives to lubricants and hydraulic oils. It was studied that additives with secondary and tertiary amines with the same alkyl radical have the same ability to reduce the corrosion rate. Thioamides of the phenyl radical are more effective additives due to their thermal-oxidizing ability compared to alkyl and heterocyclic radicals and exhibit their effect in these oils. The addition of isopropyl-p-chlorophenylthioacetamide was taken into account and the absence of precipitation in the oxidized oil and an increase in viscosity were confirmed.

The article discusses the issues of dangerous corrosion destruction of stainless steels, which are the main structural material of nuclear power plants. The applied methods of protection against local corrosion and corrosion cracking are described. The authors have proposed a method of corrosion protection by applying alternating current to sections of a pipeline separated by an electrically insulating insert. A theory describing the effect of weak alternating current on the kinetics of the corrosion process of a steel pipeline is briefly presented. The presented innovative approach to the issue of corrosion protection of technological metal pipelines will be of interest to specialists of enterprises and organizations related to the issues of corrosion cracking of stainless steels and nickel alloys to identify ways to protect structures of nuclear power plants from it.

Anticorrosive polyurethane materials of a new generation of the «Kurs» brand have been developed to increase the reliability and durability of thermal networks. The projected service life of protective coatings is at least 30 years.

Corrosion caused by carbon dioxide (CO₂ ) poses considerable problems to infrastructure in maritime settings, significantly impacting the oil and gas industries. This study examines the CO₂ corrosion rates in water samples obtained from four significant sites in the western Caspian Sea: Sumqayit, Neftchala, Bilgah, and Pirallahi. We utilised gravimetric analysis to quantify the corrosion rates of steel plates submerged in these fluids for five hours at ambient temperature. The findings indicated differing degrees of corrosion aggressiveness throughout the locales, with Sumqayit and Neftchala demonstrating the most outstanding rates. This underscores the geographical variability in water chemistry and its influence on corrosion. Comprehending these patterns is vital for formulating tailored corrosion control strategies, especially in industries such as oil, gas, and transportation, where the durability of infrastructure is paramount. The work establishes a foundation for future investigations into corrosion inhibitors, providing insights for improving protective strategies in the industrial settings of the Caspian area.