Oxidation resistant ferrous base foil

Details Oxidation resistant ferrous base foil Oxidation resistant ferrous base foil

C - Chemistry, Metallurgy

23

C

117/103, 117/118

C23C 2/12 (2006.01) B32B 15/01 (2006.01) C23C 2/18 (2006.01) C23C 2/26 (2006.01) C23C 8/12 (2006.01)

Patent

CA 1282288

OXIDATION RESISTANT FERROUS BASE FOIL AND METHOD THEREFOR ABSTRACT OF THE DISCLOSURE 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.

508904

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