Calculation of Electrochemical Corrosion Rate at Elbow of Supercritical CO₂ Pipeline

Abstract

Based on the CCUS project planned to run in a domestic oil field, the electrochemical corrosion at the bend of supercritical CO2 pipeline was studied by means of high-temperature and high-pressure reaction kettle hanging plate experiment, and the corrosion rate of X80 pipeline steel in unsaturated, saturated and supersaturated supercritical CO2 with water content was obtained. Then through COMSOL simulation of the corrosion rate of 90° bent pipe in the supercritical CO2 corrosion atmosphere, the maximum corrosion rate position of electrochemical corrosion generated under the action of flow accelerated corrosion (FAC) generated by supercritical CO2 fluid in the bent pipe was obtained, and corresponding anticorrosion Suggestions were put forward according to the research results.