Corrosion Behavior of 80SS Pipeline Steel in Tarim Gas Field

To know the anticorrosion ability of 80SS pipeline steel in gas field and enhance its application in Tarimu gas field,the corrosion of 80SS pipeline steel was studied in a simulative environment of Tarimu gas field containing H2S and CO2.The scanning electron microscopy(SEM)and X-ray diffraction(XRD)were used to examine the composition and morphology of the corrosion samples.The effects of temperature and contents of H2S and CO2 on corrosion were also studied.The results showed that in the simulative environment,the corrosion of 80SS was mainly uniform corrosion at low temperatures,but the corrosion rate increased and transferred to severe localized corrosion with the increase of temperature.The 80SS had excellent performance of anticorrosion against H2S,but the anticorrosion ability against CO2 was poor.The 80SS is suitable for the gas field containing high H2S and low CO2.