Patent Number: 6,332,926

Title: Apparatus and method for selectively coating internal and external surfacesof an airfoil

Abstract: A gas turbine airfoil has an external surface and an internal passagetherethrough. The internal passage is selectively coated by providing asource of a flowable precursor coating material in contact with theinternal passage of the airfoil, and providing a coating preventionstructure overlying at least a portion of the external surface. Theflowable precursor coating material is flowed from the source of theflowable precursor coating material and through the internal passage ofthe airfoil. The coating prevention structure prevents contact of theflowable precursor coating material with the external surface of theairfoil.

Inventors: Pfaendtner; Jeffrey A. (Blue Ash, OH), Rigney; Joseph D. (Milford, OH), Das; Nripendra N. (West Chester, OH), Darolia; Ramgopal (West Chester, OH)


International Classification: C23C 16/04 (20060101); C23C 016/00 ()

Expiration Date: 12/25/2014