Slurry coating system

Details Slurry coating system Slurry coating system

1997-05-22

1998-09-15

Cameron, Erma

Compositions: coating or plastic

Coating or plastic compositions

Corrosion inhibiting coating composition

106 1405, 106 1411, 106 1421, C09D 508

Patent

active

058074287

ABSTRACT:
The present invention relates to a composition for coating internal surfaces of an airfoil, particular high pressure temperature airfoils such as vanes and blades. The composition includes a dry composition consisting essentially of from about 2.5 wt % to about 7.0 wt % aluminum fluoride, from about 5.0 wt % to about 20 wt % of a chromium-aluminum powder, and from about 75 wt % to about 92.5 wt % Al.sub.2 O.sub.3. The dry composition is mixed with water and a cellulose compound to form a slurry which is thereafter injected into the airfoil. The coating compositions of the present invention are valuable in that they are capable of forming an oxidation and corrosion resistant coating on the internal surfaces of the airfoil simultaneously with the formation of an exterior corrosion and oxidation resistant coating. A process for simultaneously forming corrosion and oxidation resistant coatings on the interior and exterior surfaces of an airfoil is described herein.

REFERENCES:
patent: 4132816 (1979-01-01), Benden et al.
patent: 5217757 (1993-06-01), Milaniak et al.
patent: 5366765 (1994-11-01), Milaniak et al.

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