Effect of H_2S Partial Pressure on CO_2/H_2S Corrosion of Oil Tube Steels

摘要

The CO_2/H_2S corrosion behaviors of oil tube steels N80 and P110 at different H_2S partial pressure (0.2psi, 3psi, 9psi, 18psi) were investigated by autoclave corrosion tests, corrosion rate calculation and corrosion morphology observation. The results show that with the increase of H_2S partial pressure the CO_2/H_2S corrosion rates of both steels increase at first and then decrease after the peaks appear at 3psi H_2S.