ABSTRACT
Electrochemical impedance represents the measurement of the circuit’s ability to resist to electric current flow, similar to resistance, but with the difference that it is not limited to an ideal resistor. The main application of electrochemical impedance is one of the most important tools used in investigations and measurements, namely the electrochemical impedance spectroscopy (EIS). The earliest use of analogs to explain electrochemical data was done in 1940 by P. I. Dolin and B. V. Ershler. All of the electrochemical impedance techniques represent a stand-alone domain, known as EIS, a powerful technique used in investigations and measurements. The interpretation of electrochemical impedance data implies knowledge from various fields, such as chemistry, electrochemistry, physics, electricity, mechanics and, to obtain better results and to use this technique to its maximum potential, a high level of mathematical knowledge is needed. EIS could be applied for testing and assessment of industrial coatings and in the automotive industry.
