Corrosion Behavior of L360MCS Steel in Condensed Water in Puguang Gas-field

Cyclic voltammetry, potentiodynamic polarization curve and electrochemical impedance spectroscopy (EIS) were used to investigate the corrosion behavior of L360MCS pipeline steel in condensed water of Puguang gas-field. The results showed that the polarization resistance decreased with increasing corrosion time. At the same time, the corrosion current density increased and corrosion potential decreased. EIS indicated that there was no protective corrosion product film formed. The corrosion rate showed a significant difference between the base, HAZ and weld, which would lead to grooving corrosion.