Electrochemical Impedance Spectroscopy on 3‐D Inhomogeneous Surfaces Corrosion Inhibition of Carbon Steel in Weakly Acidic NaCl Solutions

Abstract The corrosion behavior of carbon steel in weakly acidic NaCl solutions which were aerated or deaerated by H2 or CO2 has been studied in the temperature range 298 K ≥ T ≥ 343 K depending on the rotation frequency of RDE and the exposure time using conventional corrosion test methods and electrochemical impedance spectroscopy (EIS). Based on different theoretical transfer functions, the EIS data were analyzed with nonlinear fit procedures. It is shown that this method can be succesfully applied for an efficient and rapid screening of about 150 organic inhibitors for oil and gas production.