초록 ▼

A method of removing a ceramic coating, such as a thermal barrier coating (TBC) of yttria-stabilized zirconia (YSZ), from the surface of a component, such as a gas turbine engine component. The method generally entails subjecting the ceramic coating to an aqueous solution of ammonium bifluoride, opt

A method of removing a ceramic coating, such as a thermal barrier coating (TBC) of yttria-stabilized zirconia (YSZ), from the surface of a component, such as a gas turbine engine component. The method generally entails subjecting the ceramic coating to an aqueous solution of ammonium bifluoride, optionally containing a wetting agent, such as by immersing the component in the solution while maintained at an elevated temperature. Using the method of the invention, a ceramic coating can be completely removed from the component and any cooling holes, with essentially no degradation of the bond coat.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method of removing a thermal-insulating yttria-stabilized zirconia (YSZ) layer from a gas turbine engine component without removing a metallic bond coat on a surface of the component that adheres the YSZ layer to the component, the method comprising the step of immers

[ What is claimed is:] [1.]1. A method of removing a thermal-insulating yttria-stabilized zirconia (YSZ) layer from a gas turbine engine component without removing a metallic bond coat on a surface of the component that adheres the YSZ layer to the component, the method comprising the step of immersing the component in an aqueous solution comprising ammonium bifluoride, wherein the immersing step further comprises heating the component and the solution to a temperature of between 60.degree. C. and 77.degree. C.