Abstract
Local electrochemical impedance spectroscopy (LEIS) technique is a novel method for the study of local corrosion, which is based on the assumption that the local impedance can be gen- erated by measuring the AC-local-current density in the vicinity of the working electrode in a usual three-electrode cell configuration. From a practical point of view, this was achieved with the use of a dual microelectrode for sensing the local AC-potential gradient, the local current being obtained from the direct application of the Ohm's law. In this paper, the history and principles of this tech- nique were reviewed, while the applications in the field of corrosion research and the characteris- tics of this method were also discussed.
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