Electrophoresis combined excellent film properties (in terms of adhesion, throwing power and the evenness of the coating thickness) together with high transfer efficiency, high degree of automation and high environmental acceptability.This work starts from this interest in the electrochemical correlation between metal and electrodeposition process and from previous studies which have shown that the substrate seems to affect the properties of cathodic electrocoat paint. The aim is to survey if there is any correlation between electrophoretic clearcoats properties and electrochemical characteristics of different substrates. With this purpose, cataphoretic deposition of a clearcoat was carried out on three metal substrates with different electrochemical behaviors: active (bare steel), passive (nickel) and noble (gold). The deposition thickness depends not only on the applied voltage and deposition time, but it is also affected by the type of substrate. Therefore the first step was to find the right combination of time–voltage values in order to obtain the same thickness, 20μm, on all the substrates. After that, several samples were produced and then cured at the same temperature.The study of the relationship between the substrate and the properties of the clear coating included test of the electrochemical behavior of the metal substrate in the deposition bath as well as during the deposition process. The deposition current has been monitored throughout the deposition and the metal substrate has been test by means of polarization curves and electrochemical impedance spectroscopy (EIS) in the deposition solution. Moreover the final coatings have been characterized by electrochemical impedance spectra in order to evaluate the barrier properties of the coating and its water uptake tendency. Last but not least, the adhesion to the different substrates was investigated by means of pull-off tests.