Electrochemical noise measurement for evaluating anti‐corrosive paints

The purpose of this paper is to outline the electrochemical noise method as a way of evaluating quickly (screening) coatings formulations in the laboratory. The standard configuration requires two test specimens and a reference electrode. Equipment is relatively inexpensive and is computer controlled. Data analysis is quite simple but to improve accuracy some treatment of the plots may be necessary. Some previously published results for application to water‐borne coatings both intact and when scratched are reproduced here to illustrate the method. Comparison has been made with DC techniques. Application of the method to detached coatings is included.