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Surfacing-of-aluminum-bodies-by-anodic-spark-deposition

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Surfacing of aluminum bodies by anodic spark deposition

Details

Inventors: Boyle, David; Collins, David Robert; Popoola, Oludele Olusegun; Pergande, Paul Earl; Wong, Tony Leung;
Assignee:
Primary Examiner: Gorgos; Kathryn
Assistant Examiner: Tran; Thao
Attorney, Agent or Firm:

Aluminum or aluminum alloy bodies, such as cast fuel pump bodies, are subjected to anodic spark deposition under deposition conditions in an electrolyte effective to form an surface layer that is enriched in alpha alumina to improve surface hardness and that includes a substantially uniform distribution of lubricant-retaining, nanosize surface pores.

DETAILED DESCRIPTION An object of the present invention is to satisfy this need by subjecting an aluminum or aluminum alloy body to anodic spark deposition under deposition conditions in an electrolyte effective to form a surface layer that is enriched in alpha alumina to improve surface hardness and that includes lubricant-retaining surface pores distributed across an outer surface of the layer.
The surface layer may be doped in-situ during deposition with a solid state lubricant.
Aluminum or aluminum alloy bodies, such as fuel pump bodies discussed above, having such a surface layer formed thereon exhibit improved wear resistance as compared to conventional hard-anodized and water-sealed aluminum or aluminum alloy bodies.

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