PHYSICOCHEMICAL PROPERTIES OF CORROSION INHIBITION OF STEELS AND THE FORMATION OF MINERAL SALT DEPOSITS.

Аннотация

The work investigated the physicochemical properties of import-substituting and export-oriented new composite corrosion inhibitors of St.3 and St20 steels, and it was found that with an increase in the inhibitor concentration from 0.1% to 1.0% in aqueous, acidic, and neutral environments, the degree of corrosion protection was 96.2÷99.8%. Thermodynamic values (∆H, ∆S, ∆G) were calculated, and the effective activation energy value of 28.5-47 kJ/mol was determined based on the dependence of IgK-1/T. The synthesized composite corrosion inhibitors were tested on the equipment and pipelines of the Shurtan Gas Chemical Complex for anti-corrosion properties, including the prevention of mineral salt deposits, by comparing the productivity of "Option" and "Nalco" brand inhibitors supplied from abroad.

Synthesized composite corrosion inhibitors with the participation of zinc oxide, glycerin, caustic soda, sodium hydroxide, and the distillation residue of methyl ethyl ammonium reagents based on oxyethylene phosphonic acid, the composite inhibitor were tested on equipment and pipelines of the Shurtan Gas-Chemical Complex for anti-corrosion, including to prevent the formation of deposits of mineral salts, comparing the performance of inhibitors brands "Option" and Nalco, supplied from abroad.