Evaluation of Corrosion Rate by Electrochemical Impedance in a System with Multiple Polarization Effects
Author:
- 17 April 1989
- conference paper
- Published by Association for Materials Protection and Performance (AMPP)
- p. 1-10
Abstract
The impedance of a system consisting of reinforcing steel with a partially debonded epoxy cover in concrete is modelled by taking first into consideration distributed capacitance and electrolyte resistance inside the resulting crevice for the regions where corrosion is not taking place. The resulting impedance is coupled to the impedance of metal dissolution reactions either concentrated or distributed inside the crevice. Mixed activation-concentration polarization of a species undergoing reduction is also considered. The predicted impedance of the system is compared with experimental results, and a tentative criterion for corrosion rate evaluation is presented.Keywords
This publication has 9 references indexed in Scilit:
- Technical Note: Equivalent Circuits Representing the Impedance of a Corroding InterfaceCorrosion, 1988
- Electrochemical Impedance Spectroscopy on 3‐D Inhomogeneous Surfaces: Corrosion in Neutral Aerated SolutionsJournal of the Electrochemical Society, 1988
- Electrochemical impedance in a thin surface electrolyte layer. Influence of the potential probe locationElectrochimica Acta, 1987
- Current distribution during the electrochemical corrosion protection of pipesCorrosion Science, 1983
- The solution composition and electrode potential in pits, crevices and cracksCorrosion Science, 1983
- The Location of Cathodic Reaction during Localized CorrosionJournal of the Electrochemical Society, 1979
- Abschätzung der porenstruktur poröser elektroden aus impedanzmessungenElectrochimica Acta, 1976
- The Polarization Resistance Technique for Measuring Corrosion Currents1976
- On porous electrodes in electrolyte solutions—IVElectrochimica Acta, 1964