Patent ID: 8723535
Filing Date: 2014-05-13
Classification: G01N

Abstract:
1. A process for evaluating corrosion resistance of an anode coating applied over a surface of an anode and corrosion resistance of a cathode coating applied over a surface of a cathode comprising: (i) sealably positioning said anode in an anode holder located on a chamber of a corrosion resistance evaluator, said chamber containing an electrolyte therein such that a portion of said anode coating is exposed to said electrolyte, said portion of said anode coating having an anode defect thereon; (ii) sealably positioning said cathode in a cathode holder located on said chamber such that a portion of said cathode coating is exposed to said electrolyte, said portion of said cathode coating having a cathode defect thereon; (iii) directing a computer of said evaluator through computer readable program code means residing on a usable storage medium located in said computer and configured to cause said computer to perform following steps comprising: a) subjecting said portions of said anode coating and said cathode coating to a start-up period; b) directing an impedance measurement device in communication with said computer and is connected to said cathode and said anode to measure n c) determining start-up solution resistances ( d) determining start-up resistances ( e) directing a direct current variable power generator to apply n f) directing said impedance measurement device to measure a set of impedances B at the end of each of said preset duration at said preset frequencies of AC power with said amplitude supplied by said alternating current variable power generator to produce n g) determining stepped-up solution resistances ( h) determining stepped-up resistances ( i) subjecting said portions of said anode coating and said cathode coating to n j) directing said impedance measurement device to measure a set of impedances C at the end of each of said preset recovery periods at said preset frequencies of AC power with said amplitude supplied by said alternating current variable power generator to produce n k) determining recovery solution resistances ( l) determining recovery resistances ( m) calculating corrosion performance resistance (R wherein n 1 , n 2 , n 3 and n 3 range from 1 to 100; and Sta f n1 , Stp f n2 , and Rec f n3 range from 0.0000001 to 1; and n) causing computer