Increasing the Corrosion Resistance of the Material of Oil and Gas Equipment in Water-Salt Solutions by Changing the Electrochemical Parameters

Abstract

The high aggressiveness of process liquids associated with the presence of dissolved gases, mechanical impurities, salt ions, mineral acids and bases in them contributes to the destruction of oil and gas equipment. The main way to increase the corrosion resistance of the material of oil and gas equipment under the action of acidic components is the injection of a chemical reagent - a neutralizer. To study the effect of an electric field on production media, a method has been developed to control the electrochemical parameters of these media. According to the method, the flow of the medium is processed in a special unit by an electric field, which helps to separate the liquid into two oppositely charged flows - anolyte and catholyte. In this work, the study made it possible to establish the effect of catholyte on the kinetics of corrosion, and also revealed the dependence of the corrosion rate of carbon steel 09G2S on the concentration of the reagent alkali and catholyte at different pH values. A comparative assessment of the use of the most effective concentration of catholyte to increase the corrosion resistance of the material has been carried out.