Coating processes – Restoring or repairing – Metal article
Patent
1997-07-02
2000-03-28
Bareford, Katherine A.
Coating processes
Restoring or repairing
Metal article
298891, B32B 3500
Patent
active
060428791
ABSTRACT:
A method for preparing a protectively coated, apertured article to be recoated reduces the likelihood that the apertures will become constricted as a consequence of subsequent recoating. The invention, described in the context of a gas turbine engine blade (12) having transpiration cooling passages (34), includes the step of diffusing an auxiliary coating (52) into an existing coating (28) and into the exposed substrate material (26) at the periphery of the passages to form a diffusion zone (54). The blade is then subjected to a stripping agent so that the diffusion zone (54) any undiffused existing coating, and any undiffused auxiliary coating are removed. The method causes a compensatory enlargement of the mouth (44) of each passage so that excess coating that accumulates in the passage mouths during subsequent recoating does not restrict the flow capacity of the passages.
REFERENCES:
patent: 2226383 (1940-12-01), Norris
patent: 3325319 (1967-06-01), Frantzen
patent: 3622391 (1971-11-01), Baldi
patent: 3679500 (1972-07-01), Kubo et al.
patent: 3700418 (1972-10-01), Mayeda
patent: 4004047 (1977-01-01), Grisik
patent: 4290845 (1981-09-01), Betz et al.
patent: 4600470 (1986-07-01), Maynard et al.
patent: 4619707 (1986-10-01), Hirschmeier et al.
patent: 4705203 (1987-11-01), McComas et al.
patent: 5225246 (1993-07-01), Beers et al.
patent: 5254413 (1993-10-01), Maricocchi
patent: 5334417 (1994-08-01), Rafferty et al.
patent: 5509556 (1996-04-01), Balz et al.
patent: 5512382 (1996-04-01), Strangman
patent: 5526950 (1996-06-01), Tago et al.
Draghi Peter J.
Shurman Brian J.
Simard Dale A.
Wrabel Peter
Baran Kenneth C.
Bareford Katherine A.
United Technologies Corporation
LandOfFree
Method for preparing an apertured article to be recoated does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for preparing an apertured article to be recoated, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preparing an apertured article to be recoated will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1324012