Abstract

High aggressiveness of process fluids associated with the presence of dissolved gases, solids, ions of salts, mineral acids and bases contributes to the destruction of oil and gas equipment. The main way to reduce the corrosion rate of oil and gas equipment material due to acidic components is to inject a chemical reagent - a neutralizer. To study the effect of an electric field on field fluids, a method for controlling the electrochemical parameters of these fluids has been developed. According to the method, the fluid stream is processed by an electric field in a special unit, which helps to separate the fluid stream into two oppositely charged ones: anolyte and catholyte. In this paper, we consider the question of studying the corrosion rate of 09G2S carbon steel in mineralized solutions with different pH values using chemical reagents and catholyte. The study revealed the effect of catholyte on the kinetics of corrosion, and also revealed the dependence of the corrosion rate of carbon steel on the concentration of alkali and catholyte reagent at different pH values. A comparative assessment on the use of the most effective concentration of catholyte to reduce the corrosion rate was carried out.

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