Modified wire beam electrode: a useful tool to evaluate compatibility between organic coatings and cathodic protection

In this work, an experimental probe, constituted of 210 mini-electrodes, named modified wire beam electrode, was prepared in order to follow the processes of the local coating delamination under cathodic protection conditions. Measurements of the galvanic corrosion current between microelectrodes and of the cathodic protection current were realized. Non-uniformity of the coating was easily shown and the delamination rate near the artificial defect was estimated.