Catalyst of a coating on an alloy substrate

Details Catalyst of a coating on an alloy substrate Catalyst of a coating on an alloy substrate

1977-04-04

1978-06-20

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252464, 252466J, 252466PT, 252466B, 4232135, B01J 2104, B01J 2374, B01J 2386

Patent

active

040960951

ABSTRACT:
A catalyst suitable for treating automobile exhaust emissions comprises an Al-containing Fe-base alloy substrate with a protective coating of, e.g., Al.sub.2 O.sub.3 and Cr.sub.2 O.sub.3 and a second coating of, e.g., Al.sub.2 O.sub.3 and a Pt-group metal. The coatings may be applied using sols obtained by dispersing Al.sub.2 O.sub.3, prepared by vapor phase condensation methods, in water and having appropriate convertible salts dissolved therein, followed by firing.

REFERENCES:
patent: 3873472 (1975-03-01), Oshima et al.
patent: 3907708 (1975-09-01), Lacroix
patent: 3920583 (1975-11-01), Pugh
patent: 3944504 (1976-03-01), Ford et al.

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