CORROSION BEHAVIOR OF ANTI-SULFIDE TUBING STEEL N80S IN ENVIRONMENT CONTAINING CARBON DIOXIDE AND TRACE HYDROGEN SULFIDE

Corrosion behavior of N80S anti-sulfide tubing was studied in an environment containing carbon dioxide and a little hydrogen sulfide.The H2S played the major role in the reaction.FeS formed firstly during the progress of the experiment,it could resist the corrosion of CO2.Corrosion product films were regular.Average corrosion rate was high,and there was slight localized corrosion on the surface of N80S.