Process for treating steel sheets for the purpose of enamelling

Details Process for treating steel sheets for the purpose of enamelling Process for treating steel sheets for the purpose of enamelling

1975-03-06

1977-03-15

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 635, 148 16, 427330, 427376H, 427383C, C23D 300

Patent

active

040122395

ABSTRACT:
For treating a steel sheet for subsequent enamelling of the sheet with one coat of enamel: After rolling the sheet, there is deposited thereon a coat of nickel and/or cobalt, a salt of said metals or mixtures of said salts. After drying, the sheet is annealed in a decarburizing atmosphere so as to substantially totally decarburize it and, during the cooling of the annealing cycle, the coated sheet is subjected to the action of an oxidizing atmosphere containing 2 to 7% of water vapor and having an H.sub.2 /H.sub. 2 O ratio which is less than 6.

REFERENCES:
patent: 1779273 (1930-10-01), Hommel
patent: 1857215 (1932-05-01), Ruder
patent: 2455331 (1948-11-01), Eckel et al.
patent: 2755210 (1956-07-01), Sutphen et al.
patent: 2878151 (1959-03-01), Beall et al.
patent: 2940865 (1960-06-01), Sullivan
patent: 2961337 (1960-11-01), Bryant et al.
patent: 2988853 (1960-06-01), Certa
patent: 3639177 (1972-02-01), Tedmon et al.

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