Method for Electrolytic Stripping of Spray Metal Coated Substrate
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United States of America Patent
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Issued Date -
May 27, 2010
app pub date -
Dec 1, 2008
filing date -
Nov 27, 2008
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Abandoned
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Abstract
A method for stripping a fused thermal spray metal coating from the surface of a soft metallic substrate. The steps for the method include: immersing the coated metallic substrate in an aqueous solution of chromic acid, peroxide, and a second acid; immersing a metal cathode in the aqueous solution; applying a positive potential to the fused spray metal coated substrate and a negative potential to the metal cathode to generate a direct current between the substrate and the cathode; where the current is applied for a sufficient time to remove the coating. This method permits the electrochemical removal of fused and impermeable thermal spray metal coatings.
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