Study of corrosion behavior of carbon and low-alloy steels in CO2-containing environments

Abstract

Carbon and low-alloy steels, which constitute the main volume of pipe production, are unstable to the action of aggressive mineralized oil fields environments, which are often in the late stage of development. Recently, attempts have been made to use steels with an economical alloying of chromium up to 0.5% in CO2-containing media without application of the additional measures against corrosion. The corrosion behaviour of carbon and low-alloy steels with a chromium content of up to 0.5% in CO2-containing environments was investigated by electrochemical and metallographic studies. The results show that the addition of 0.5 wt% Cr could not effectively improve the corrosion resistance of the low-Cr alloy steel in CO2-containing environments.