Patent ID: 7313485
Filing Date: 2007-12-25
Classification: G01N

Abstract:
1. A method for determining the extent of an oxidation reaction of a coated metal turbine component within a turbine, comprising: providing an aluminum comprising coating on a metal substrate; providing a family of reference oxidation rate curves for the aluminum comprising coating as a function of time and temperature; calculating an actual oxidation rate for the aluminum comprising coating during operation of the turbine as a function of time or temperature; creating a path dependent oxidation rate curve based upon the calculated actual oxidation reaction rate; comparing the path dependent oxidation rate curve with the family of oxidation reaction rate curves; selecting from the family of reference oxidation reaction rate curves, a curve that generally corresponds with the path dependent oxidation rate curve; and using the selected curve and a summation of incremental amounts of the calculated actual oxidation reaction rate to approximate and makes available to a user the extent of oxidation of the coated turbine component.