Electrolysis: processes – compositions used therein – and methods – Electrolytic erosion of a workpiece for shape or surface... – Electrolyte composition or defined electrolyte
Reexamination Certificate
2005-11-29
2005-11-29
King, Roy (Department: 1742)
Electrolysis: processes, compositions used therein, and methods
Electrolytic erosion of a workpiece for shape or surface...
Electrolyte composition or defined electrolyte
C205S115000, C205S717000
Reexamination Certificate
active
06969457
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.
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Colaizzi Tris
Ferrigno Stephen Joseph
Grossklaus Warren Davis
LaGraff John Robert
MacDonald Leo Spitz
DiConza Paul J.
King Roy
Powell, III William E.
Wilkins, III Harry D.
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