Patent ID: 6503347
Filing Date: 2003-01-07
Classification: C10G,C23C,Y10T

Abstract:
A method of providing a protective surface made up of a surface alloy on a base alloy containing iron, nickel, chromium and alloying additives comprising: depositing onto said base alloy a surface alloy comprised of an effective amount of silicon and at least one of aluminum, titanium and chromium and heat treating said base alloy with said surface alloy at a temperature in the range of 400 to 1160Â° C. to a desired maximum temperature to generate a surface alloy consisting of an enrichment pool which contains 2.5 to 30 wt. % silicon, 0 to 10 wt. % titanium, 2 to 45 wt. % chromium and 0 to 15 wt. % aluminum with the balance thereof being iron, nickel and any base alloying additives, whereby said enrichment pool is functional to reduce the deposition of catalytically formed coke thereon.