Effect of H₂S Partial Preesure on Corrosion Rate of P110 Steel under High Cl- Oil Condition

Effect of H2S partial pressure on corrosion rate of P110 steel under high Cl- condition was investigated in the autoclave containing stimulating oil and gas field environment,and the corrosion rate was measured by the weight loss method.And the corrosion scales were analyzed using SEM,XRD and EDS,The results showed that the corrosion rate of P110 steel increased first and decreased subsequently with the increase of H2S partial pressure,and the maximal corrosion rate was presented at 0.06 MPa.H2S partial pressure affected of and thus influenced the corrosion rate the thickness,surface morphology,composition of the corrosion scale of P110 steel and thus influenced the corrosion rate.