Cleaning and liquid contact with solids – Processes – Including work heating or contact with combustion products
Reexamination Certificate
2006-02-14
2010-12-07
Carrillo, Sharidan (Department: 1792)
Cleaning and liquid contact with solids
Processes
Including work heating or contact with combustion products
C134S022100, C134S022160, C134S026000, C134S028000, C134S030000, C134S034000, C134S035000, C134S036000, C134S039000, C134S040000, C134S042000, C427S230000, C427S252000, C427S255230, C427S255280, C427S327000
Reexamination Certificate
active
07846261
ABSTRACT:
Methods for cleaning surface deposits, such as sulfidation deposits or dust particles, from a surface bounding an internal passage in a turbine engine component. The surface deposits are cleaned by placing a halogen-containing organic compound, such as a fluorine-containing organic compound, into the internal passage and heating the component and organic compound to chemically react the halogen-containing species in the liquefied and boiling organic compound with the deposits. The temperature is further elevated to vaporize the chemically-modified deposits, which are moved by mass transport through the internal passage and out of the turbine engine component. An optional protective coating, such as a chromium or aluminum coating, may be applied to the cleaned surface of the internal passage.
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Chesnes Richard Patrick
Fairbourn David C
Aeromet Technologies, Inc.
Carrillo Sharidan
Wood Herron & Evans LLP
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