Process for producing elevated temperature corrosion resistant m

Details Process for producing elevated temperature corrosion resistant m Process for producing elevated temperature corrosion resistant m

1977-08-03

1979-03-20

Newsome, John H.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

204180R, 204192N, 427 34, 427 38, 427 42, 427250, 427376H, 427377, 427383D, 427423, 428679, 428680, B05D 306

Patent

active

041454812

ABSTRACT:
A process for providing coatings on metal articles whereby the articles will be resistant to corrosion at elevated 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 corrosion at elevated temperatures. An outer layer of aluminide or metal which is resistant to corrosion at elevated temperatures but which is subject to embrittlement at such temperatures 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 temperature and simultaneously applying isostatic pressure to the article.

REFERENCES:
patent: 3361562 (1968-01-01), Ulrich et al.
patent: 3594219 (1971-07-01), Maxwell et al.
patent: 3620693 (1971-11-01), Sama et al.
patent: 3869779 (1975-03-01), Gedwill et al.
patent: 3873347 (1975-03-01), Walker et al.
patent: 3961098 (1976-06-01), Bessen
patent: 3978251 (1976-08-01), Stetson et al.
patent: 4070507 (1978-01-01), Stueber et al.

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