Oxydationsbestaendige Legierungen auf Eisengrundlage mit einem Gehalt an Chrom und Aluminium und/oder Silicium

摘要

1,260,424. Ferrous alloy with an oxide coating. OLIN CORP. July 14, 1969 [Aug. 8, 1968], No.35349/69. Headings C7A and C7U. An oxidation and tarnish resistant body is made by surface oxidation at 300 to 1000‹ C. for 5 minutes to 100 hours of an alloy comprising: - the balance, apart from 0À2% max. in total of other elements, being Fe. The oxide film produced by the above process is adherent and substantially colourless.