Given the need to protect metal structures and equipment from the destructive effects of aggressive media, the search for new corrosion inhibitors constitutes a relevant and important area of development in the modern chemical industry. Corrosion significantly reduces the durability and reliability of metal products, which increases maintenance costs and the risk of failures, while also negatively affecting environmental safety. Therefore, it is relevant to synthesize compounds with potential anticorrosive properties. In order to expand the range of such substances, secondary amines were obtained by condensing cyclic aldehydes and primary amines, as well as by reducing condensation products. The structure of the synthesized compounds was confirmed via infrared spectroscopy and nuclear magnetic resonance spectroscopy (¹H and ¹³C). The infrared spectra of the synthesized azomethines reveal imine-characteristic C=N stretch absorption bands at 1650–1570 cm^-1. In the ¹H nuclear magnetic resonance spectra, the protons of the azomethine group resonate at 8.15–8.25 ppm; the ¹³C nuclear magnetic resonance spectra reveal the carbon atoms of the imine group at δ_c of 158.00–161.00 ppm. The ability of the obtained compounds to inhibit corrosion in a model medium was tested using a gravimetric method. Their protective properties were evaluated using an electrochemical method. The properties of the obtained compounds are consistent with data presented in bibliographic sources. The best result was obtained for the secondary amine 2-((2-((4-chlorobenzyl) amino)ethyl)amino)ethan-1-ol, which exhibits anticorrosive properties in a hydrogen sulfide medium and provides a 97% protection level.

The study aims to identify factors contributing to the development of various Russian industries that use supercritical fluid technologies and facilitate their transition from laboratory to industrial scale. The considered technologies are used in the pulp and paper, oil and gas, construction, woodworking, textile, automotive, food, chemical, agricultural, pharmaceutical, and space industries, as well as in medicine and ecology. The specifics of applying supercritical fluid technologies in these sectors are considered. Carbon dioxide is the most commonly used solvent due to its availability and relatively low critical parameters. Supercritical water and other fluids have prospects for industrial use; however, their use on an industrial scale requires thermodynamic conditions. Technological and industrial sovereignty is ensured by the resource capabilities of the oil and gas, food, and agricultural industries. Of strategic importance is the space industry, which requires further research into the application of supercritical fluid technologies. Some sectors of the Russian industry can contribute to sovereignty, provided that equipment is produced for applying promising technologies and expanding the range of various solvents on an industrial scale. It is also necessary to introduce a pilot stage between laboratory research into the application of supercritical fluid technologies and the transition to the industrial stage. For several industries, sovereignty requires a greater quantity of raw materials used in supercritical fluid systems. In conclusion, the identified factors are discussed from the perspective of the large-scale development of specific industries through the considered technologies.