Harmonic analysis for corrosion monitoring

This technique is related to electrochemical impedance spectroscopy (EIS), in that an alternating potential perturbation is applied to one sensor element in a three element probe, with a resultant current response. Not only the primary frequency but higher order harmonic oscillations are analyzed in this technique. Theory has been formulated, whereby all kinetic parameters (including the Tafel slopes) can be calculated explicitly. No other technique offers this facility. At present the technique remains largely unproven and rooted in the laboratory domain.