Praxair S.t. Technology, Inc.

Kasey Hughes

Ardy Kleyman

Daming Wang

Ardy S Kleyman

This invention relates to a thin and texturized film that can be applied onto a non-smooth surface to improve hardness, corrosion resistance and wear resistance properties of the surface while maintaining the underlying profile of the non-smooth surface. An additive overlaying process can be employed to produce the thin and texturized film on the non-smooth surfaces without substantial alteration or degradation of the underlying surface texture or profile of the non-smooth surfaces so as to sufficiently preserve the underlying surface texture or profile. The thin and texturized film fully covers the non-smooth in a uniform manner and maintains the surface profile.

Thin and texturized films having fully uniform coverage of a non-smooth surface derived from an additive overlaying process

A fluid tight, fully-densified, coating is prepared by a High Velocity Oxygen Fuel ('HVOF') process that dilutes oxygen with an inert gas. The inert gas is pre-mixed with oxygen prior to the oxygen entering a combustion chamber. The resultant flame temperature is lowered a controlled amount to eliminate, minimize or reduce oxidation of power feedstock that is injected into the thermal spray torch. The ability to reduce the flame temperature allows a relatively smaller particle feedstock to be deposited without significant oxidation. The dilution process creates an as-deposited fully-dense, fluid tight coating.

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Crawfordsville, IN, United States of America

Kasey Hughes