The study of inhibiting structural material corrosion in water recycling systems by sodium hydroxide

Study of effectiveness of heavy metals ions as the inhibitors of steel corrosion

“…It was determined that oxyethylidenidiphosphonic and nitrilotrimethylphosphonic acids stabilize the passivation oxygen film, providing a degree of corrosion protection at 95−98 % at acid doses of 10 mg/dm 3 . However, with an increase in the temperature of aqueous medium from 20 °C to 50 °C, the protective effect is reduced from 93 % to 59 % and from 81 % to 75 % for OEDPhA and NTMPhA, respectively, at a dose of 5 mg/dm 3 .…”

“…The introduction of closed water systems is currently considered to be the only rational solution for the efficient use of water in industry [3,4]. In order to achieve this goal, various kinds of water losses, which may occur as a result of corrosion of equipment and pipelines, should be avoided.…”

“…The sensor made of steel 20 was installed in a glass of 150 cm 3 , and at a certain time intervals, the polarization resistance of Rp was measured using the P5126 indicator. During the experiment, by integrating the area under the curve, which was built in the coordinates Rp -t (time), and by division of the resulting total area by the total time, the average value of Rp cr was determined.…”

“…The use of Ukrainian materials as fillers for building purposes is conditioned by affordability, low cost, and a capability of obtaining materials with a variety of necessary operational and technological properties. Interest in this area is primarily due to the study of the physicochemical properties of surface phenomena in composite materials [1][2][3][4][5][6]. The relevance of this trend arises in the process of creating new polymeric building composites which constitute heterogeneous systems with highly developed interphase boundaries.…”

Study into the influence of concentration of ions of chlorine and temperature of circulating water on the corrosion stability of carbon steel and cast iron

“…Such experimental data are necessary for the development of a new method for protection of structural materials of circulating water supply systems. This method is based on the formation of passive films on the surface of ferrous metals when sodium hydroxide is added to circulating water [11].…”