Enhanced coating system for turbine airfoil applications

A tightly adherent anti-stick coating (28) applied over coated turbine components of gas turbine engines. The tightly adherent coating (28) is an oxide of at least one metal selected from the group consisting of Pt, W, group 4b and group 5b metals of the periodic table and Si, Ge and Sn of group 4a. The oxide is applied directly over existing environmental coatings (22), and thermal barrier coatings (26). It can also be applied directly to substrate material and to areas that are not within the combustion exhaust gases, such as platform portions (30) and shank portions (40) of airfoils including turbine blades (10). The oxide is conveniently applied to a uniform thickness of no greater than about 10 microns, and prevents the build-up of corrosion products and other products of combustion from the gases, thereby increasing the life expectancy of the component.