PSI - Issue 59

Igor Stadnyk et al. / Procedia Structural Integrity 59 (2024) 679–686 Igor Stadnyk et al./ Structural Integrity Procedia 00 (2023) 000 – 000

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standard at 50°С temperature for 120 minutes. Investigations were conducted both without IGH-3 and in the presence of 2%. This is due to the presence of orgahe environment, which significantly enhances corrosion processes (Novitskiy 1984). The results of our investigations in the form of photographs of copper plates before and after aging are shown in Fig. 1. Adhesion of protective coatings and systems was determined by the method of parallel incisions according using U-1A example, hardness - using ME-3 device according, elasticity - using ShG-1 device according. The degree of ecological completeness of anti-corrosion systems was evaluated by comparing MPC of their volatile components and the solvent taken as a reference due to its low toxicity.

a) c) Fig. 1. Photographs of copper plates: (a) original; (b) after being in the environment; (c) after being in liquid mixture with the presence of 2g/l% corrosion inhibitor IGH-3. The research was carried out in the following way: porcelain crucible (5) placed on an electric stove (6) was filled with up to 30 cm 3 of the medium mixture (inhibitor + starch-containing liquid). The heating of the electric stove (6) was turned on (fig. 2) . Heating was carried out to 100°C. A quartz tube perforated at one end (4) was lowered from above onto the crucible. The tube served to create a directed flow, generating a circulation circuit of the heated mixture. The perforation provided air access to the heating zone, thereby supporting the process. Copper plate (3) was placed on top of quartz tube at the distance of 30 cm from the are of heating of the medium mixture in special slots. Control of the temperature of the heating products close to the copper plate was determined by TN-7 thermometer (1). The screw quartz tube was fixed on the tripod (2). When the mixture passed close to the copper plate, conditions for deposition on its surface by heating were created (Sokolenko et al., 2003; Filipschuk 2016). The main mass of the formed vapor mixture condensed and flew down the walls of the tube 4 into the porcelain crucible 5. b)

Fig. 2. Scheme of the laboratory installation: 1 – thermometer; 2 – tripod; 3 – copper plate; 4 – quartz tube; 5 – crucible; 6 - electric stove

While considering the steady process of corrosive wear of the surface in aggressive environments, the thermodynamic system can be defined as the relationship between the temperatures occurring during the operation. Analysis of the environment movement in the devices can be determined using universal energy criteria by irreversible processes thermodynamics. Such processes are described by means of dissipative function, expression (1). The investigation shows that the energy dissipation rate associated with plastic deformation and the formation of new surfaces is as follows: