Process for producing elevated temperature corrosion...

Details Process for producing elevated temperature corrosion... Process for producing elevated temperature corrosion...

B - Operations, Transporting

05

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204/96.03, 117/7

B05D 3/12 (2006.01) C23C 10/00 (2006.01) C23C 10/52 (2006.01) C23C 28/02 (2006.01) C23F 17/00 (2006.01)

Patent

CA 1117828

PROCESS FOR PRODUCING ELEVATED TEMPERATURE CORROSION RESISTANT METAL ARTICLES Abstract Of The Disclosure A process for providing coatings on metal articles whereby the articles will be resistant to corrosion at ele- vated temperatures. The process involves the application of an overlay on an article surface, the overlay comprising a ductile metal of a composition normally resistant to corro- sion at elevated temperatures. An outer layer of aluminide or metal which is resistant to corrosion at elevated tempera- tures but which is subject to embrittlement at such tempera- tures is applied to complete the coating. Porosity in the coating is then eliminated and a high integrity corrosion resistant coating not subject to cracking is obtained by heating the article in a gaseous atmosphere to elevated tem- perature and simultaneously applying isostatic pressure to the article.

308741

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