Process of masking cooling holes of a gas turbine component
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United States of America Patent
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-
Mar 20, 2007
Grant Date -
Sep 29, 2005
app pub date -
Nov 24, 2004
filing date -
May 24, 2002
priority date (Note) -
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status (Latency Note)
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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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