This paper presents the experimental results for CO2 corrosion of C-1018 carbon steel in a multiphase flow system using electrochemical noise measurement. A unique biased ZRA mode electrochemical noise technique is utilized to study the corrosion processes and detect localized corrosion preferentially on a single electrode due to external polarization of the bias voltage under extended exposure times. For full pipe flow at 0.55 m/s liquid velocity, the experimental results show that both noise resistance Rn and noise impedance...
Keywords: bias voltage, biased ZRA mode, multiphase flow, slug flow,
electrochemical noise
measurement (ECN)