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:
Feb. 27, 1979
Filed:
Jan. 20, 1976
Martin Pfistermeister, Duren-Gurzenich, DE;
Heinz Krapf, Selgersdorf, DE;
Erwin Coester, Julich, DE;
URANIT Uran-Isotopentrennungs-Gesellschaft mbH, Julich, DE;
Abstract
A method is provided for forming an anti-corrosive, oxide layer on steel. The steel surface is subjected to superheated steam for a period of one to several hours. Before subjecting the steel to the superheated steam, a clean steel surface is initially heated to at least 200.degree. C. in a nitrogen, air, or oxygen atmosphere. The treatment with superheated steam takes place during a further heating period in which a temperature between 450.degree. C. and 520.degree. C. is reached and maintained under steam flow through conditions in which the steam flow is turbulent or should have a Reynolds number greater than 900.