Loading patent…
AssigneeGeneral Electric Company
InventorsLawrence Bernard Kool, Ralph James Carl, Jr., Bin Wei, James Anthony Ruud, Mark Alan Rosenzweig, Stephen Joseph Ferrigno
Estimating the term…
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 HxAF6, 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.
An electrochemical stripping method for selectively removing at least one coating from the surface of a substrate, comprising the step of immersing the substrate in an aqueous composition through which electrical current flows, wherein the composition comprises an acid having the formula HxAF6, or precursors to said acid, wherein A is selected from the group consisting of Si, Ge, Ti, Zr, Al, and Ga;
An electrochemical stripping method for selectively removing at least one diffusion coating or overlay coating from the surface of a superalloy substrate, comprising the following steps:
An electrochemical method for partially stripping a coating from the surface of a substrate, wherein the coating comprises an upper sublayer and a lower sublayer, said method comprising the step of immersing the substrate in an aqueous composition which comprises an acid having the formula HxAF6, or precursors to said acid, wherein A is selected from the group consisting of Si, Ge, Ti, Zr, Al, and Ga, and x is 1-6;
A method for replacing a worn or damaged protective coating applied over a substrate, comprising the following steps:
An apparatus for the electrochemical removal of at least one coating from a substrate, comprising:
Dependencies are inferred from the claim text.