Patent ID: 6365034
Filing Date: 2002-04-02
Classification: G01N

Abstract:
A high throughput electrochemical test method for determining the resistance to corrosion of a metal article coated with a plurality of corrosion preventing coated areas 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 each comprising the plurality of coated areas thereon, with the proviso that there is an uncoated area of metal adjacent a coated area thereby allowing for the ultimate passage of electrical current to the metal without the coated area being a barrier to such passage; (b) impressing a series of direct current electrical potentials or a series of direct current flows, respectively, 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 or measuring the voltage as the direct current flow is varied relative to the reference electrode, respectively, to generate a potentiodynamic scan or potentiostatic scan, respectively, of the active and passive regions of the metal.