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:
Jul. 29, 2003
Filed:
Sep. 28, 2001
Lawrence Bernard Kool, Clifton Park, NY (US);
Ralph James Carl, Jr., Clifton Park, NY (US);
Bin Wei, Mechanicville, NY (US);
James Anthony Ruud, Delmar, NY (US);
Mark Alan Rosenzweig, Hamilton, OH (US);
Stephen Joseph Ferrigno, Cincinnati, OH (US);
General Electric Company, Niskayuna, NY (US);
Abstract
An electrochemical stripping method for selectively removing at least one coating from the surface of a substrate is described. The substrate is immersed in an aqueous composition through which electrical current flows. The composition includes an acid having the formula H AF , in which “A” is Si, Ge, Ti, Zr, Al, or Ga; and x is 1-6. Various coatings can be removed, such as diffusion or overlay coatings. The method can be used to fully-strip a coating (e.g., from a turbine component), or to partially strip one sublayer of the coating. Related processes and an apparatus are also described.