WHEELS HAVING A BI-LAYERED COATING AND METHODS FOR MAKING THE SAME

Abstract: a wheel includes a hub portion configured to rotate about a rotational axis. a plurality of blades extends radially outward from the hub portion. each blade of the plurality of blades includes a leading edge and a trailing edge. the hub portion and the plurality of blades include a substrate metal. the substrate metal of the plurality of blades has coated directly thereon a first coating layer including electroless nickel-phosphorous having a phosphorous content of about 4 wt. % or greater. the first coating layer has coated directly thereon overlying the plurality of blades a second coating layer including electroless nickel-phosphorous poly-alloy having a phosphorous content that is lower than the phosphorous content of the first coating layer. the second coating layer is a functional coating layer with enhanced erosion resistance.

Inventor(s): Palaniappa Murukesan, Philippe Renaud

CPC Classification: F01D5/28 (Selecting particular materials; {Particular measures relating thereto;} Measures against erosion or corrosion)

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