The issues of applying superhydrophobic coatings to the surface of metals, metal products and structures are considered. This is relevant, for example, for anti-icing protection of vehicles (airplanes, ships), power lines, buildings and structures for various purposes. In these cases, superhydrophobic coatings perform the function of ice-phobic coatings. Superhydrophobic coatings also help increase the wear resistance of metal products. This work proposes a method for increasing the wear resistance of superhydrophobic coatings through the preliminary application of an adhesive sublayer using various passivating solutions. Over the course of this work, it was found that superhydrophobic coatings with a Ti-Zr-containing sublayer have the highest abrasion resistance. The results of polarization measurements showed that the application of an adhesive sublayer also improves the protective ability of superhydrophobic coatings. The increase in protective ability was also confirmed by salt spray tests. The time until the appearence of the first signs of corrosion increased from 140 to 430 hours. During the work, two technique for determining the adhesion of ice to an aluminum surface were compared. The first technique was based on the parallel “tearing out” of a rod from the ice mass. The second technique is based on the perpendicular pulling of an of aluminum disc out of the ice mass located in the cylinder. It has been shown that when ice is detached from a surface with identical coatings, the adhesion values obtained using different methods differ: with normal detachment, the adhesion values are always lower. Obviously, this is due to the fact that during normal detachment, only the adhesion of ice to the superhydrophobic surface is determined, and during tangential separation, an additional contribution is made by the mechanical engagement of ice with surface protrusions and an increase in the force of ice pressure on the rod, resulting from the expansion of ice during freezing water. The normal tear-off method is considered more relevant.

   Complications related to the corrosive environment, according to Rosneft, are among the prevailing ones at oil and gas production facilities and occupy the 4th place among other factors complicating production – 12 % of the complicated mechanized well stock. Therefore, diagnostics and monitoring of the condition of oilfield equipment for corrosion wear is an urgent direction for improving the reliability of the technological process of oil production and transportation. The «electrical resistance» (ES) method is one of methods of corrosion monitoring in the oil and gas industry. The disadvantage of the ES method is that the devices currently used do not allow to assess the unevenness of corrosion losses on the surface of the material, that is, they cannot identify the process of local corrosion development. Nevertheless, it is local corrosion that causes failures of oilfield equipment. The article proposes a physical model of the development of corrosion, reflecting the relationship of changes in the resistance of a corroding element with the rate of corrosion consumption. The corrosion process is described through special cases of uniform and local corrosion having different rates of corrosion flow. Based on
the results of the analysis of the physical model of local corrosion, methods for interpreting data obtained from electrical resistance sensors are proposed, which allows detecting the manifestation of ulcerative corrosion. A marker of developing local corrosion is a change in the dynamic of sensing element resistance growth.

   The use of compounds extracted from natural sources and waste from the food industry, in particular plant materials, is considered as a promising direction in the search for corrosion inhibitors. The inhibitory ability of the boiling extract from the leaves and the flowers of Melissa officinalis on the corrosion of mild stainless steel EN Fe37-3FN in 0,5 M sulphuric acid medium investigated using electrochemical methods and EIS. It was shown that the addition of 100 mg/L of the Melissa officinalis extract reduces the corrosion rate by 15 %, and that of of 10 g/L – by 75 %. The adsorption of the extract components on a steel surface follows the Langmuir adsorption model, and the nature of adsorption is mostly physical. The adsorption of extract components on the steel surface is described by the Langmuir adsorption model with a good approximation reliability coefficient. The calculated Gibbs energy of the adsorption process does not exceed – 20 kJ/mol, which indicates the physical nature of adsorption. The efficiencies of corrosion inhibition of low-carbon steel in sulfuric acid with lemon balm extract, determined in the work, are comparable to the values of its efficiencies of corrosion inhibition of steels in hydrochloric acid. The Melissa officinalis extract shows itself as perspective and environmentally friendly substance for reducing the steel corrosion rate in acidic environments.

   The history of the use of aluminum for construction and aircraft goes back to the years before the First World War. On the eve of this war, the famous German designer Count Zeppelin developed a project for a large rigid airship. However, it turned out that it was impossible to make its frame from wood, since it turned out to be heavy and fragile. Aluminum was the best choice, but it was too soft. And then a fundamental decision was made to use duralumin, a light and durable aluminum-based alloy, invented in 1909 by the German chemist Wilm, in the designs of aeronautics. After the city of Duren, where it was possible to establish the production of the new metal, it was called duralumin or duralumin. Duralumin belongs to the category of structural alloys, which are characterized by increased strength. They are based on aluminum. Copper, manganese, and magnesium are used as additives in different percentages. The properties of duralumin depend on the heat treatment and the amount of added alloying elements. The article presents the results of a study of the effect of praseodymium on the anodic behavior of aluminum alloy AM4.5Mg1 of the duralumin type in a NaCl electrolyte environment. The study of the corrosion-electrochemical behavior of alloys was carried out by potentiodynamic mode with a potential sweep rate of 2 mV/s. It has been shown that the addition of praseodymium reduces the rate of anodic corrosion of the original alloy AM4.5Mg1 of the duralumin type by 20…30 %. It has been established that an increase in the concentration of chloride ion promotes an increase in the rate of anodic corrosion, regardless of the praseodymium content in the AM4.5Mg1.

   Inhibited oil compositions are widely used for anticorrosion protection of metals from atmospheric corrosion. Compositions based on industrial I20-A, motor M10G2k, fresh and waste (WMO), oils with the addition of an imported combined corrosion inhibitor M-531, as well as domestic P-2 paraffin in an amount of 3…10 wt. % for the protection of copper was investigated in the work. The kinematic viscosity was measured by the Brookfield method on a rotational viscometer, the contact angles were measured on an Easy Drop device. Polarization measurements were carried out using an IPC-Pro MF potentiostat in the potentiodynamic mode with a potential sweep rate of 0.66 mV/s in a 0.5 M NaCl solution. Empirical equations were obtained, which are a special case of the Reynolds-Filonov equation, describing the viscosity-temperature dependences for oil compositions with a high reliability of linear approximation in the temperature range of 20…60 °C. The study of the contact angles of wetting showed that water actively wets the studied oil coatings. The maximum values of the contact angles of wetting with water of oil coatings were reached after 1 day. Protective coatings on the metal were formed during the day. According to electrochemical studies, the use of a combined imported corrosion inhibitor M-531 and domestic paraffin P-2 in oil compositions for anticorrosive protection of copper is equally effective at a concentration of 10 wt. %.