Process of masking cooling holes of a gas turbine component

Details Process of masking cooling holes of a gas turbine component Process of masking cooling holes of a gas turbine component

2007-03-20

2007-03-20

Jolley, Kirsten (Department: 1762)

Coating processes

Fluorescent or phosphorescent coating

C427S553000, C427S558000, C427S595000, C427S230000, C427S235000, C427S239000, C427S259000, C427S264000, C427S265000, C427S272000, C427S282000, C427S287000

Reexamination Certificate

active

10995489

ABSTRACT:
Process of masking cooling holes of a gas turbine component with an external surface, comprising a cavity and a plurality of cooling holes before coating the gas turbine component, comprising the steps of first applying a mask material to the cooling holes so that the cooling holes are filled at least closest to the external surface, whereby the mask material contains a substance which fluoresces under ultraviolet light and a filler material. Then the mask material within the cooling holes is thickening. An inspection using ultraviolet light to locate any unwanted residual mask material on the external surface is carried out and unwanted residual mask material is removed before the coating is applied to the external surface of the component and the masked cooling holes. In the end the mask material is removed from the cooling holes.

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