Patent ID: 7754342

Claim:
A corrosion resistant coating composition comprising: a binder free of hexavalent chromium, the binder comprising silicone, the binder comprising from about 5 to about 45 weight percent of the coating composition; a corrosion resistant particulate, the corrosion resistant particulate comprising: a refractory particulate having a coefficient of thermal expansion greater than or equal to that of alumina as determined at a temperature of 1200° F., and a non-refractory particulate selected from the group consisting of FeAl, CoNiCrAlY, or combinations thereof, the corrosion resistant particulate comprising about 15 to about 92 percent by weight of the composition; and a non-aqueous solvent, the solvent comprising from about 3 to about 50 percent by weight of the composition, wherein the corrosion resistant coating has a coefficient of thermal expansion approximately that of an underlying superalloy substrate.