CO_2 Partial Pressure Influnce on Corrosion Behavior of SM80SS Super Anti-sulfide Tubing Steel in Carbon Dioxide and Hydrogen Sulfide Concomitant Environment

Corrosion behavior of SM80SS super anti-sulfide tubing steel is studied in the environment of carbon dioxide and hydrogen sulfide concomitant enviroment. The results show that average corrosion rate is low in low temperatue(40℃),corrosion product film is admixture of FeS0.9 and FeCO3,corrosion product films are fine and compact. average corrosion rate is the most high when temperature is at about 100℃,corrosion product films is admixture of FeS0.9 and FeCO3,corrosion product films great bulky and loose. corrosion product film is admixture of FeS0.9,FeCO3 and FeO(OH) when temperature is more even higher(150℃),corrosion product films are fine and compact again,average corrosion rate great low too,but films are bulkier and looser than at low temperatue. corrosion product films can block local corrosion occureing on the surface of SM80SS super anti-sulfide tubing steel,corrosion mode is even corrosion.