Corrosion of Mild Steel Using Electrochemical Impedance Spectroscopy Data Analysis

The expensive and insidious character of localized corrosion problems requires appropriate monitoring techniques. This study was conducted to establish a methodology by which the various advantages offered by electrochemical impedance spectroscopy (EIS) over other electrochemical techniques could be used for on-line monitoring of corrosion inhibitor programs. The transformation of fundamental EIS information into corrosion resistance and its characteristics was accomplished by using a recently developed technique in which the permutation of a limited number of data points can serve to generate a small population of polarization resistance values. Some interesting correlations between the patterns created by this mathematical transform and the propensity of the carbon steel specimens to suffer from localized corrosion are presented.