Quantitative Analysis of Carbon Steel Pipeline Corrosion-erosion in High Temperature and High Pressure Environments Containing CO₂

The failure cause of carbon steel pipeline in the gas-liquid two-phase flow environment containing CO2 in high temperature and high pressure conditions is the synergy of corrosion and erosion. Combining with numerical simulation and failure morphology, the data fitting was used to analyze the relationship between turbulent flow, wall shear stress and wall thickness reduction rate. The results show that the wall thickness reduction rate increased when the wall shear stress increased and the turbulence impacted the pipeline failure mode. Without turbulent flow, when the wall shear stress was from 15.85 Pa to 19.14 Pa, the corrosion products could be damaged. With turbulent flow, corrosion was still facilitated obviously by the wall shear stress produced by fluid flow which was as low as 1.88 Pa.