Validation of resistivity spectra from reinforced concrete corrosion by Kramers-Kronig transformations

In order to determine the true corrosion conditions in reinforced concrete structures, the measured impedance data must be of high quality. This paper applies Kramers-Kronig transforms (E;I;T) to validate the resistivity spectra measured from corrosion of reinforcing steel bar in concrete. The resistivity spectra were measured using four-electrode Wenner array that was placed on the surface of a reinforced concrete specimen. Various levels of anodic corrosion rates were applied to the sample in order to induce corrosion. This paper shows that the KKT successfully assess the quality of the data. (C) 2001 Elsevier Science Ltd. All rights reserved.