Cleaning and liquid contact with solids – Processes – Using sequentially applied treating agents
Reexamination Certificate
2005-04-12
2005-04-12
Carrillo, Sharidan (Department: 1746)
Cleaning and liquid contact with solids
Processes
Using sequentially applied treating agents
C134S002000, C134S006000, C134S019000, C134S027000, C134S029000, C134S030000, C134S036000, C134S037000, C134S042000
Reexamination Certificate
active
06878215
ABSTRACT:
A method of removing a virgin metal oxide coating from the surface of a superalloy gas turbine engine component. The component bearing the applied metal oxide coating is contacted with an aqueous coating-removal solution, typically containing by weight about 10-25% alkali hydroxide, about 1-8% alkanolamine, and about 0.5-5% gluconate salt at a temperature of from about 170° F. (67° C.) to about 210° F. (99° C.), for a time sufficient to remove the metal oxide coating from the superalloy blade by gentle mechanical means. The metal oxide coating can comprise one or more metal oxide layers, such as a chromium oxide layer and an aluminum oxide layer.
REFERENCES:
patent: 3553015 (1971-01-01), Dohogne
patent: 3615825 (1971-10-01), Gansser
patent: 3622391 (1971-11-01), Baldi
patent: 3833414 (1974-09-01), Grisik et al.
patent: 3954648 (1976-05-01), Belcak et al.
patent: 4098450 (1978-07-01), Keller et al.
patent: 4188237 (1980-02-01), Chasteen
patent: 4317685 (1982-03-01), Ahuja et al.
patent: 4328044 (1982-05-01), Chasteen
patent: 4439241 (1984-03-01), Ault et al.
patent: 4525250 (1985-06-01), Fahrmbacher-Lutz et al.
patent: 4655383 (1987-04-01), Fournes et al.
patent: 4713120 (1987-12-01), Hodgens, II et al.
patent: 4944807 (1990-07-01), Sova
patent: 4965095 (1990-10-01), Baldi
patent: 4975147 (1990-12-01), Tahara et al.
patent: 5071486 (1991-12-01), Chasteen
patent: 5112572 (1992-05-01), Eerkes et al.
patent: 5248381 (1993-09-01), Dunker et al.
patent: 5290365 (1994-03-01), Whitton
patent: 5330558 (1994-07-01), McCormick et al.
patent: 5643474 (1997-07-01), Sangeeta
patent: 5679170 (1997-10-01), Frenier
patent: 5763377 (1998-06-01), Dobrez et al.
patent: 5976265 (1999-11-01), Sangeeta et al.
patent: 6132520 (2000-10-01), Schilbe et al.
patent: 6146692 (2000-11-01), Sangeeta et al.
patent: 6158957 (2000-12-01), Marcin et al.
patent: 6174380 (2001-01-01), Rosenzweig et al.
patent: 6217668 (2001-04-01), Czech et al.
patent: 6267902 (2001-07-01), Cartier et al.
patent: 6355116 (2002-03-01), Chen et al.
patent: 6367686 (2002-04-01), Abriles et al.
patent: 6416589 (2002-07-01), Lipkin et al.
patent: 6454870 (2002-09-01), Brooks
patent: 6536135 (2003-03-01), Lipkin et al.
patent: 20010009246 (2001-07-01), Zimmerman et al.
patent: 20020100493 (2002-08-01), Kool et al.
patent: 20040074873 (2004-04-01), Kool et al.
Turco Alkaline Rust Remover, Material Safety Data Sheet, Atofina Chemicals, Inc., Jun. 16, 2000, USA.
Carrillo Sharidan
General Electric Company
Hasse & Nesbitt LLC
Nesbitt Daniel F.
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