Metal treatment – Compositions – Heat treating
Patent
1976-01-20
1979-02-27
Esposito, Michael F.
Metal treatment
Compositions
Heat treating
C23C 1110, C23C 1111
Patent
active
041417593
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.
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Swann, B. R. Heat-Treatment in Steam, pp. 167-172, Apr., 1954.
Coester Erwin
Krapf Heinz
Pfistermeister Martin
Childs Sadie L.
Esposito Michael F.
URANIT Uran-Isotopentrennungs-Gesellschaft mbH
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