CO₂ Corrosion of P110 Steel in High Temperature Multi-component Thermal Fluid

Corrosion behaviors of pipe steel P110 in high pressure CO2 were investigated in multicomponent thermal fluid at 40-350 ℃ by weight-loss method with high temperature and high pressure autoclave. The macroscopic and microscopic morphology and composition of corrosion products were analyzed, and the corrosion mechanism was discussed. The results showed that under the condition of high temperature the main CO2 corrosion product on the steel changed from FeCO3 to Fe2O3.