Patent ID: 6093260
Filing Date: 2000-07-25
Classification: C23C,Y10T

Abstract:
A method of providing a protective surface made up of a surface alloy-enrichment pool on a base alloy containing iron, nickel chromium and alloying additives comprising: depositing onto said base alloy an effective amount of elemental silicon, aluminum, and titanium or chromium, and heat treating said base alloy at a temperature in the range of 600 to 1150.degree. C., to generate a surface alloy consisting of an enrichment pool which contains 4 to 30 wt. % silicon, 0 to 10 wt. % titanium, 2 to 45 wt. % chromium and 0 to 15 wt. % aluminium with the balance thereof being iron, nickel and any base alloying additives said enrichment pool having a thickness in the range of 10 to 300 .mu.m whereby said enrichment pool is functional to reduce the deposition of catalytically formed coke thereon.