Coating processes – Spray coating utilizing flame or plasma heat – Metal oxide containing coating
Patent
1996-06-21
1998-03-03
Bareford, Katherine A.
Coating processes
Spray coating utilizing flame or plasma heat
Metal oxide containing coating
427454, 427455, 427456, 427310, C23C 406, C23C 402
Patent
active
057231877
ABSTRACT:
A method of bonding a thermally sprayed coating to a non-roughened light metal (i.e. cast aluminum-based) surface. The method comprises the steps of (a) depositing a flux material (i.e. potassium aluminum's fluoride containing up to 50 molar % other fluoride salts) onto such cast surface which has been cleansed to be substantially free of grease and oils, such deposition providing a dry flux coated surface, the flux being capable of removing oxide on the cast surface and having a melting temperature below that of the cast surface; (b) thermally activating the flux in the flux coated surface to melt and dissolve any oxide residing on the cast surface; and (c) concurrently therewith or subsequent to step (b) thermally spraying metallic droplets or particles onto the flux coated surface to form a metallic coating that is metallurgically bonded to the cast surface.
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Baughman James R.
Cook David J.
Joaquin Armando M.
Popoola Oludele O.
Zaluzec Matthew J.
Bareford Katherine A.
Ford Global Technologies Inc.
Malleck Joseph W.
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