Evaluation of Organic Coating with Electrocheical Impedance Spectroscopy

摘要

Beginning in the 1970s,research electrochemists and materials scientists began to discover the power of Electrochemical Impedance Spectroscopy (EIS)as a tool for studying difficult and complicated systems.Although this series of articles is aimed at the coatings scientist who is interested in EIS for coatings evaluation,EIS has application in virtually all areas of electrochemistry.This first article focuses on the general theory of EIS,and some of the instrumentation required to make the measurement.Subsequent articles will cover the challenges to making the measurement and the interpretation of EIS data on coated metal substrates.The final article will discuss the application of EIS to problems in coatings for corrosion protection.