Ferritic stainless steel substrate for catalytic system

Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants

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252465, 4232135, B01J 2104, B01J 2106, B01J 2118, B01J 2386

Patent

active

042773741

ABSTRACT:
A system comprising a ferritic stainless steel substrate having a tightly adherent oxide coating and a catalytic material thereupon. The ferritic stainless steel is of a chemistry which forms a tightly adherent non-spalling scale suitable for application of a catalytic bearing material. It consists essentially of, by weight, up to 26% chromium, from 1 to 8% aluminum, from 0.02 to 2% hafnium, up to 0.3% yttrium, up to 0.1% carbon, up to 2% silicon, balance essentially iron.

REFERENCES:
patent: 3027252 (1962-03-01), McGurty et al.
patent: 3298826 (1967-01-01), Wukusick
patent: 3591365 (1971-07-01), Ohmachi
patent: 3920583 (1975-11-01), Pugh
patent: 4189405 (1980-02-01), Knapton et al.
Wukusick, The Physical Metallurgy and Oxidation Behavior of Fe-Cr-Al-Y Alloys, U.S. Atomic Energy Commission, Jun. 1, 1966, Contract No. AT(40-1)-2847.
Perkins et al., Sulfidation-Resistant Alloy For Coal Gasification Service, U.S. Energy Research and Development Administration, Jun. 14, 1977, Contract No. E(49-18)-2299.

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