INVESTIGATION OF ANTICORROSIVE COATINGS BY THE ELECTROCHEMICAL NOISE METHOD

The electrochemical noise (ECN) method was used to evaluate the protec tiveness of five alkyd primers containing various inhibitive pigments applied to steel panels. A navel experiment was used to monitor specim ens immersed in dilute Harrison's solution and 2 M sodium chloride. Bl istering occurred in the sodium chloride environment and was related t o changes in the ECN parameters. These results were compared with thos e for identical systems put through cyclic salt spray and hot salt bat h accelerated tests. Generally, the work established ECN lest techniqu es for future evaluation of multicoat organic systems.