Method of making an oxidation resistant ferrous base foil

Details Method of making an oxidation resistant ferrous base foil Method of making an oxidation resistant ferrous base foil

1987-05-08

1988-04-12

Pianalto, Bernard D.

Coating processes

Application to opposite sides of sheet, web, or strip

427247, 427360, 427365, 427367, 427369, 427373, 427377, 4273839, 427405, 4274193, 427431, 427436, B05D 100

Patent

active

047373814

ABSTRACT:
Aluminum coated ferritic base metal foil formed by cold reduction of hot dip aluminum coated ferritic steel strip containing from 10% to about 35% chromium, up to 3% aluminum, and up to 1% silicon, the foil having a ratio of aluminum coating thickness on both sides to base metal foil thickness of at least 1:10, with at least 4% by weight total aluminum. The method of production includes heating the foil in an oxidizing atmosphere within specified temperature and time limitations to provide a porous surface having a thin layer of aluminum oxide. The foil is adapted for fabrication into monolithic support structures for catalytic converters for internal combustion engine exhaust systems.

REFERENCES:
patent: 2170361 (1939-08-01), Whitfield
patent: 3059326 (1962-10-01), Jominy et al.
patent: 3214820 (1965-11-01), Smith et al.
patent: 3867313 (1975-02-01), Brewer
patent: 4188309 (1980-02-01), Volker et al.
patent: 4414023 (1983-11-01), Aggen et al.
patent: 4624895 (1986-11-01), Nickola

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