The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2004
Filed:
May. 22, 2002
Konstantin K. Tzatzov, Sherwood Park, CA;
Alexander S. Gorodetsky, Sherwood Park, CA;
Andrew Wysiekierski, Okanagan Falls, CA;
Gary Anthony Fisher, Edmonton, CA;
Bodycote Metallurgical Coatings Limited, Newbridge, GB;
Abstract
A method for protecting low-carbon steel and stainless steel from coking and corrosion at elevated temperatures in corrosive environments, such as during ethylene production by pyrolysis of hydrocarbons or the reduction of oxide ores, by coating the stainless steel with a coating of MCrAlXSiT in which M is nickel, cobalt, iron or a mixture thereof, X is yttrium, hafnium, zirconium, lanthanum, scandium or combination thereof, and T is tantalum, titanium, platinum, palladium, rhenium, molybdenum, tungsten, niobium, boron or combination thereof. A blended powder composition to produce a desired MCrAlXSiT surface alloy may be applied to the substrate. The overlay coating and stainless steel substrate preferably are heat-treated at about 1000 to 1200° C. for about 10 minutes or longer effective to metallurgically bond the overlay coating to the substrate and to form a multiphased microstructure.