The obtained values of Rp and IE values calculated on Eq. ( ) are shown in Fig. . As for the polarization data described above, low concentrations of the molybdate inhibitor (10 mM) resulted in a decrease of Rp. At higher concentrations of Na2MoO4, the values of Rp were gradually increasing reaching the maximum in 0.05 NaCl solution with 150 mM of Na2MoO4. The obtained values of the inhibition efficiency (Eq. ( )) were similar to those of the potentiodynamic measurements. The EIS data were analyzed and fitted following the approach proposed in and used in our previous publications . To minimize the possible overestimation of the corrosion resistance and fitting error, the fitting was performed by the equivalent circuit shown in Fig. .