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AssigneeGeneral Electric Company
InventorsLawrence Bernard Kool, James Anthony Ruud, Kenneth B. Potter, Myron Clyde Murth, Ladd Sterling Laird, Gabriel Ofori-Okai
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A chemical composition for selectively removing an aluminum-containing material from a substrate comprises an acid having a formula of HxAF6, a precursor thereof, and a mixture of said acid and said precursor; wherein A is selected from the group consisting of Si, Ge, Ti, Zr, Al, and Ga; and x is in a range from 1 to 6, inclusive. The chemical composition can comprise at least another acid selected from the group consisting of phosphoric acid, nitric acid, sulfuric acid, hydrochloric acid, hydrofluoric acid, hydrobromic acid, hydriodic acid, acetic acid, perchloric acid, phosphorous acid, phosphinic acid, alkyl sulfonic acids, mixtures thereof, and precursors thereof. The chemical composition can be used to remove aluminum seal strips selectively from the dovetail of a turbine-engine blade.
A chemical composition comprising a first compound selected from the group consisting of an acid having a formula of HxAF6, a precursor thereof, and a mixture of said acid and said precursor;
A method for selectively removing an aluminum-containing material from a work piece, wherein said work piece comprises a substrate on which said aluminum-containing material is disposed, said method comprising contacting said work piece with a chemical composition that comprises a first compound selected from the group consisting of an acid having a formula of HxAF6, a precursor thereof, and a mixture of said acid and said precursor;
A method for selectively removing an aluminum-containing material from a work piece, wherein said work piece comprises a substrate on which said aluminum-containing material is disposed, said method comprising contacting said work piece with a chemical composition that comprises an acid having a formula of H2SiF6, phosphoric acid, and hydrochloric acid;
Dependencies are inferred from the claim text.