Electrochemical impedance spectroscopy apparatus and method of use thereof

摘要

An electrochemical impedance spectroscopy apparatus includes a conduit having a first conductive probe positioned therein. One end of the conduit is coupled in a fluid tight manner to a surface of an electrically conductive object or a coating thereon whereupon an electrolyte solution disposed in the conduit is in fluid communication with the first conductive probe and the surface or the coating. A second conductive probe outside the conduit is moved into electrical contact with the object, either directly or via the coating. An AC signal applied between the first and second conductive probes is swept between a first frequency and a second frequency. A characteristic or property of the surface and/or the coating is determined from the response thereof to the swept AC signal.