Bilayer Protection Coating and Related Method

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A turbine component having a protective bilayer coating thereon comprises : a superalloy substrate (10); and a bilayer protective coating (12) applied to the substrate (10) wherein the bilayer protective coating comprises a first inner layer (14) of platinum and aluminum; and a second outer oxidation-resistant layer (16) applied over the first inner layer (14), the second outer layer (16) comprising an MCrAlX alloy where M is selected from Fe, Ni and Co, and where X is yttrium or another rare earth element. A method of improving oxidation resistance of a Ni or Co-based superalloy turbine component comprises : depositing a bilayer protective coating (12) on a turbine component by depositing a first inner platinum-aluminum layer (14) on a surface of the turbine component; and depositing a second outer layer (16) comprising an MCrAlX alloy over the first inner layer, wherein M is a metal selected from Fe, Ni and Co, and X is yttrium or another rare earth element.