Another approach in analysis of paint coatings with EIS measurement: Phase angle at high frequencies

Some electrical parameters could be extracted from EIS measurements of a coated metal like: coating capacitance, coating resistance, double layer capacitance, and charge transfer resistance. Although these elements are very valuable in analysis of electrochemical behavior of a coated system their extraction from EIS results is time consuming and always there are some error in calculation of the results with a model. In this paper an attempt is made to introduce a new parameter that could be easily extracted with no error in calculation. Theta at high frequencies has very good agreement with other extracted parameters.