Electrochemical investigations of conductive coatings applied as anodes in cathodic protection of reinforced concrete

Results of electrochemical measurements of conductive coatings, based on the mixing of pigmentary graphite in a polymer matrix are presented in this work. Electrochemical parameters are determined for the investigated coatings during long-term anodic polarisation on reinforced concrete. Based on impedance measurements the electrochemical parameters of conducting coatings are calculated. It is shown that the investigated coatings can be used in cathodic protection of reinforced concrete. The investigations show that the optimum graphite contents in coatings used for protection of concrete should be in the range from 40% to 45%.