Potentiodynamic polarization curves were recorded in a potential range from -300 mV to +700 mV vs. the OCP at a scan rate of 1.0 mV/s. To properly assign the corrosion current density (icorr) value from the obtained polarization dependencies, an approach based on the calculation of the intersection of the corrosion potential with the extension of the cathodic Tafel region of polarization curves, was used . The inhibition efficiency, IE, of the inhibitor was calculated based on the electrochemical data using the formulas: