ELECTROCHEMICAL TEST FOR MEASURING CORROSION RESISTANCE

摘要

The resistance to corrosion of a metal article (14) coated with a resinous coating can be determined by an electrochemical test method which comprises: (a) making a portion of the coated metal article, from which a portion (15) of the coating has been removed to allow for the ultimate passage of electrical current therethrough, the working electrode (18) in an electrochemical cell (19) which also contains a reference electrode (12), a counter-electrode (13) and an electrolytic solution (16); (b) impressing a series of direct current electrical potentials upon the working electrode to enable current to flow between the metal article in the electrochemical cell and the counter-electrode; and (c) measuring the current flow as the direct current potential is varied relative to the reference electrode.