General Electric Company

Tris Colaizzi

Stephen Joseph Ferrigno

Bin Wei

Warren Davis Grossklaus, Jr

James Douglas Risbeck

John Robert LaGraff

Leo Spitz MacDonald

Thomas Edwin Anderson

Michel Joseph Shaw

Michael J Shaw

Warren D Grossklaus

Leo S Macdonald

John R Lagraff

An electrochemical process for selectively stripping at least one coating from the surface of a substrate is disclosed. The substrate (often a turbine engine component) is immersed in a composition through which electrical current flows. The composition includes a halide salt, such as sodium chloride, ammonium chloride, and potassium chloride. In preferred embodiments, the electrical current is direct current (DC). The process is especially useful for selectively removing portions of diffusion aluminide coatings. For example, the additive layer can efficiently be removed, without substantially affecting the underlying diffusion layer or substrate. Related stripping compositions and apparatuses are also described.

Method for partially stripping a coating from the surface of a substrate, and related articles and compositions

A method of cleaning airfoils and related turbine engine components that have a crust-like debris deposited on the surface thereof. This method involves subjecting at least the portion of the component having the deposit of the crust-like debris to sufficient laser shock peening to cause the debris on the surface thereof to be loosened therefrom so that the loosened debris can be removed from the component. This loosened debris can then be removed from the component, such as by passing a cleaning fluid through the portion of the component that is subjected to the laser shock peening.

Method of cleaning turbine component using laser shock peening

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Marita Chiba, Japan

Tris Colaizzi