Stainless steel and stainless steel surface

Details Stainless steel and stainless steel surface Stainless steel and stainless steel surface

C - Chemistry, Metallurgy

22

C

C22C 38/38 (2006.01) C21D 1/72 (2006.01) C22C 38/58 (2006.01) C23C 8/02 (2006.01) C23C 8/14 (2006.01) C23C 8/18 (2006.01) C23C 30/00 (2006.01)

Patent

CA 2420229

A stainless steel comprising at least 20 weight % of chromium and at least 1.0 weight % of manganese is adapted to support an overcoating having a thickness from 1 to 10 microns of a spinel of the formula MnxCr3-xO4 wherein x is from 0.5 to 2. Preferably the overcoating is on chromia and has stability against chemical reaction at temperatures at least 25~C higher than the uncoated chromia.

Un acier inoxydable comprenant au moins 20 % de chrome en masse et au moins 1,0 % de manganèse en masse est adapté pour accueillir un revêtement du groupe des spinelles d'une épaisseur comprise entre 1 et 10 microns, représenté par la formule Mn?x¿Cr?3-x¿O?4¿ dans laquelle x vaut de 0,5 à 2. Ce revêtement est de préférence placé sur des chromes et il possède une stabilité contre la réaction chimique à une température supérieure à au moins 25 ·C par rapport à celle de la stabilité des chromes présents sous ce revêtement.

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