Process for the passivation of ferrosilicon

Details Process for the passivation of ferrosilicon Process for the passivation of ferrosilicon

1975-10-08

1977-09-27

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 635, 148105, 148110, 148113, 427216, C23C 1100

Patent

active

040509575

ABSTRACT:
A process for the passivation of discrete particles of ferrosilicon containing 30-90% by weight silicon comprises contacting the particles with a gaseous oxidizing agent at a temperature between 800.degree.-1150.degree. C for a time ranging between 1-12 hours. The treated particles can be admixed with a binding agent to form a paste which, in turn, is used as a coating for shielded arc electrodes.

REFERENCES:
patent: 2050305 (1936-08-01), Frey et al.
patent: 2110717 (1938-03-01), Sellers
patent: 2873512 (1959-02-01), Robinson
patent: 3169851 (1965-02-01), Fleming, Jr. et al.

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