High throughput electrochemical test for measuring corrosion resistance

摘要

A high throughput electrochemical test method for determining the resistance to corrosion of a metal article coated with a resinous coating which comprises:;(a) making, as the working electrode in an electrochemical cell which also comprises a reference electrode, a counter-electrode and an electrolytic solution, one or more metal articles comprising a plurality of coated areas thereon, with the proviso that a portion of the coating does not exist on the metal thereby allowing for the ultimate passage of electrical current to the metal without the coating being a barrier to such passage;;(b) impressing a series of direct current electrical potentials upon each of the respective coated areas in sequence and upon the respective associated 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 to generate a potentiodynamic scan of the active and passive regions of the metal.