Organic coating compositions for aluminizing metal...

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Reexamination Certificate

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C428S416000, C523S443000, C523S457000

Reexamination Certificate

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07449241

ABSTRACT:
An organic coating composition is described, which can be used to enrich the surface region of a metal-based substrate with aluminum. The composition comprises an aluminum-based powder and at least one organic resin, e.g., alkyds, epoxies, or silicone materials. At least some of the aluminum-based powder is in the form of substantially spherical powder particles. The coating composition is substantially free of hexavalent chromium. It can be applied to the substrate by a variety of techniques, such as spraying. It is then heat-treated, to cause diffusion of aluminum into the surface region of the substrate, e.g., a turbine engine component. The composition exhibits good thermal and chemical stability for extended periods of time. Related articles are also described.

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Conversion table for mesh number to particle size as provided by the sigma aldrich internet site.
Product data sheet for Menjamin Moore Silicon Alkyd Aluminum Paint No. M66-79.
E-mail dialogue between the Examiner and general counsel of the Benjamin Moore Company.
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“Technology of Paints, Varnishes and Lacquers”, Edited by C. R. Martens, Reinhold Book Corporation (1968); pp. 230-243; 254-255.

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