Production of galvanized steel strip

Details Production of galvanized steel strip Production of galvanized steel strip

1977-03-30

1979-03-06

Kendall, Ralph S.

Coating processes

With pretreatment of the base

Shielding or spacing

427321, 427329, 427309, 427374C, 427433, 427259, 148153, 118 65, 118 69, 118 72, C23C 102

Patent

active

041431847

ABSTRACT:
Steel strip is first heated to a predetermined temperature suitable for imparting desired properties to the strip and is then immersed in an aqueous bath maintained at substantially its boiling temperature. The composition of the aqueous bath is preferably adjusted to ensure the formation of an oxide film on the entire surface of the strip. After the strip has been withdrawn from the bath, oxide is eliminated from at least part of the surface of the strip, e.g., from one or both faces, by removal of the oxide or by reduction of the oxide. Simultaneously or subsequently, the strip is heated to a given temperature, e.g., 420.degree.-550.degree. C., maintained at this temperature, and immersed at this temperature in molten zinc.

REFERENCES:
patent: 222655 (1879-12-01), Breeding
patent: 2118758 (1938-05-01), Crapo
patent: 3010844 (1961-11-01), Klein et al.
patent: 3383250 (1968-05-01), Pierson et al.

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