CO₂/H₂S Corrosion Behavior of Tubular Steel N80 at Different H₂S Partial Pressures

The CO2/H2S corrosion behavior of tubular steel N80 at different H2S partial pressures (0.001 5 MPa,0015 MPa,0.02 MPa,0.06 MPa,0.12 MPa) was studied by autoclave tests,weight loss method and SEM analysis.The severe CO2/H2S corrosion occurred on tubular steel N80 in the tests.The corrosion rate increased at first and then decreased with increasing of H2S partial pressure.And the peak value appeared at 0.02 MPa of H2S partial pressure.