The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 2005
Filed:
Oct. 21, 2002
Leo Spitz Macdonald, Schenectady, NY (US);
Bin Wei, Mechanicville, NY (US);
Michel Joseph Shaw, Albuquerque, NM (US);
John Robert Lagraff, Niskayuna, NY (US);
Warren Davis Grossklaus, West Chester, OH (US);
Stephen Joseph Ferrigno, Cincinnati, OH (US);
Tris Colaizzi, Marita Chiba, JP;
Leo Spitz MacDonald, Schenectady, NY (US);
Bin Wei, Mechanicville, NY (US);
Michel Joseph Shaw, Albuquerque, NM (US);
John Robert LaGraff, Niskayuna, NY (US);
Warren Davis Grossklaus, West Chester, OH (US);
Stephen Joseph Ferrigno, Cincinnati, OH (US);
Tris Colaizzi, Marita Chiba, JP;
General Electric Company, Niskayuna, NY (US);
Abstract
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.