Study on the Internal Corrosion Mechanism of CO₂, H₂S to Oil Gas Pipelines

This paper covers the corrosion reactive mechanism of CO₂ of single phase and multiphase oil/gas pipelines and studies on the electrochemical corrosion of H₂S and SSCC reactive condition and functional mechanism of H₂S. T he influence of corrosion rate with different content of CO₂ to some metal materials is tested and the curve of corrosion reactive rale is given. And also the influence law of CO₂ to the internal corrosion of pipeline is analyzed. A sample is taken from X80 steel and is tested in high temperature and high pressure container. The corrosion law of X80 steel in different concentration of H₂S is found out.