Use of a scanning electrochemicl impedance spectroscopy technique to investigate localized corrosion

摘要

Recently, the authors have proposed a method for generating local electrochemical impedance maps of electrodes. In this technique impedance maps, at each frequency of interest, are generated by measuring the ratio of ac solution current density, very near the electrode, to the applied potential is measured as a function of position. A review of this method, the results from two model systems, which demonstrate that this technique may be used to generate quantitative data, and its use to investigate aluminum alloys will be presented. 7 refs., 3 figs.