The use of electrochemical impedance spectroscopy to study Armco iron corrosion in acid solutions inhibited by quaternary ammonium compounds

The reliability of Electrochemical Impedance Spectroscopy (EIS) technique in evaluating Armco iron corrosion rates in acid solutions inhibited by quaternary ammonium compounds is discussed. A mathematica elaboration of EIS data is used to obtain the parameters of the equivalent circuit related to the precess of iron corrosion in the quoted media. A better fitting between experimental and simulated impedance spectra is obtained if distributed time constants are used