Over the course of this work, the physicochemical and mechanical properties of coatings were investigated in order to find good alternatives to chromate coatings. It was found that zirconium- as well as cerium- and lanthanum-containing coatings are able to withstand exposure to both high and low temperatures without the degradation of their protective characteristics. It was established that the thickness of the zirconium[1]containing coatings amounts to 170 nm, whereas the thickness of the cerium- and lanthanum-containing coatings is 210 nm. It should be noted that the thickness of the chromate layers is much higher and is in the range of 200…1000 nm. It was also established that cerium- and lanthanum-containing coatings formed in a manganese sulfate containing solution have the best protective ability among the coatings developed – 82 hours before the appearance of the first foci of white rust, which is higher than the time until the appearance of the first centers of white rust mandated by international standards for chromate coatings. It has been established that zirconium-containing coatings are suitable as an adhesive sublayer for further paint or varnish application.

At present, the protection of oil industry equipment from corrosion from a scientific, technical and economic point of view remains one of the most important tasks. Given the relevance of the topic, a bactericide was synthesized to protect oilfield equipment and pipelines from general and microbiological corrosion - an inhibitor of complex action. This paper presents an analysis of the results of scientific research in the field of synthesis, study of properties and search for areas of application of the synthesized amides based on amines (aniline, benzylamine) and natural petroleum acid (NPA). Solutions of the obtained compounds in isopropyl alcohol were prepared and their properties as a bactericidal agent against sulfate-reducing bacteria were studied. Solutions of the compounds of benzylamine amide NPA and aniline amide NPA in isopropyl alcohol at a concentration of 50 mg/l showed a bactericidal effect equal to 90 and 86%, respectively, and at a concentration of 150 mg/l – 97 and 90%, respectively. A solution of benzylamine amide NPA in isopropyl alcohol at a concentration of 250 mg/l exhibits a 100% bactericidal effect.

               It was found that the synthesized amides have a high bactericidal-inhibiting activity against sulfate-reducing bacteria, and therefore can be used as corrosion inhibitors in the oil industry.

The article presents the results of studies of blade processing using modern modifications of cubic boron nitride (CBN) substrates of thin plates made of sapphire used for the manufacture of “Silicon-on-Sapphire” microcircuits (SOS). These microcircuits are focused on application in space and special equipment due to increased speed and resistance to radioactive exposure. With the right choice of cutting tool geometry, tooling parameters and cutting modes, such processing can be carried out and allows you to obtain a roughness at the level of 20…30 nm.

The work is devoted to the study of the possibility of using stearic acid and 1-dodecanethiol as hydrophobizators to obtain a superhydrophobic coating. Stearic acid was otained from an alcoholic solution, 1-dodicanthiol both from an alcoholic solution and from vapors. To test hydrophobizators, a dendritic coating was used, obtained from a dilute copper plating sulfate electrolyte at the limiting diffusion current, followed by reinforcement the resulting structures with a thin layer of metal deposited at a low current. The thicknesses of the resulting layers of stearic acid and dodecanethiol-1 were estimated, the effect of hydrophobizators on the coating morphology at the micro- and submicro - levels was studied, the wetting angles on the resulting coatings and their stability in a corrosive-aggressive environment were measured.

Copper deposition via galvanic replacement from aqueous sulfate electrolytes does not allow direct copper electroplating on metals and alloys more electronegative than copper (for example, iron and steel), since it prevents good adhesion of the coating to the matrix. An effective solution to this problem is the binding of copper ions in an electrolyte solution into stable complexes. The cathodic reduction of such complexes occurs at potentials more negative as compared to hydrated copper ions, which reduces the electromotive force of the galvanic replacement process. It is known that copper ions form chloride complexes in deep eutectic solvents based on choline chloride. In this work, for the first time, the contact deposition of copper on iron and steel substrates is investigated in a copper(I)-containing solution in the deep eutectic solvent – ethaline. Deposits are characterized by atomic force and electron microscopies and energy-dispersive X-ray spectroscopy. It has been established that copper deposition via galvanic replacement in a CuCl-containing ethaline takes place, however, the rate of this process is low and strongly depends on the substrate material (iron, grade-U8 steel, grade-20 steel). Furthermore, we show that galvanic replacement in the ethaline-based solution does not have any noticeable effect on morphology of the galvanic copper coating and its adhesion to the substrate.