Investigation of anticorrosive coatings by the electrochemical noise method

Abstract

The electrochemical noise (ECN) method was used to evaluate the protectiveness of five alkyl primers containing various inhibitive pigments applied to steel panels. A novel experiment was used to monitor specimens immersed in dilute Harrison`s solution and 2 M sodium chloride. Blistering occurred in the sodium chloride environment and was related to changes in the ECN parameters. These results were compared with those for identical systems put through cyclic salt spray and hot salt bath accelerated tests. Generally, the work established ECN test techniques for future evaluation of multicoat organic systems.