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Title: Method for forming an anticorrosive oxide layer on steels
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, the steel surface is initially subjected to a gaseous formic acid atmosphere at a raised temperature of up to 480.degree. C. 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 maintained under steam flow-through conditions in which the steam flow has a Reynolds number greater than 900.
Other info: Inventors: Coester, Erwin (Julich, DE, US) Krapf, Heinz (Julich, DE, US) Pfistermeister, Martin (Duren, DE, US) Sartor, Bruno (Pier, DE, US) Mohrhauer, Hans (Julich, DE, US) Application Number: 852569 Filing Date: 1977-11-17 Publication_date: 1979-05-08 Assignee: Uranit Uran-Isotopentrennungs-Gesellschaft mbH (Julich, DE) Primary Class(es): 148/286 148/287, 428/472.2 Other Classes: US Patent Ref:
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