Process for applying a metal coating to a metal strip by preheat

Details Process for applying a metal coating to a metal strip by preheat Process for applying a metal coating to a metal strip by preheat

1989-12-11

1991-12-31

Beck, Shrive

Coating processes

With pretreatment of the base

Heating or drying pretreatment

4273982, 427431, 427436, 164461, 164463, B05D 302

Patent

active

050770942

ABSTRACT:
A process for applying a metal coating 11 to a metal strip substrate 2 by preheating the casting surface in a non-oxidizing atmosphere and maintaining a casting surface temperature T.sub.s below the solidus temperature of the metal coating material, passing the casting surface through a melt pool 9 of the metal coating material at a pool temperature at least 25.degree. C. in excess of its melting temperature to deposit a melt layer 21 at a casting temperature T.sub.c, and simultaneously rapidly cooling the metal strip substrate from the back surface to solidify the melt layer to an adherent solid coating, wherein the surface temperature T.sub.s is less than about 20 percent (in .degree.K.) below the casting temperature T.sub.c.
The process is particularly useful when coating metal strip with an alloy of limited solubility metals.

REFERENCES:
patent: 3201275 (1965-08-01), Herrick
patent: 3479210 (1969-11-01), Ross
patent: 3971123 (1976-06-01), Olsson
patent: 4152471 (1979-05-01), Schnedler et al.
patent: 4171392 (1979-10-01), Sievert et al.
patent: 4177326 (1979-12-01), Windal et al.
patent: 4321289 (1982-03-01), Bartsch
patent: 4323419 (1982-04-01), Wakefield
patent: 4326579 (1982-04-01), Pond, Sr. et al.
patent: 4529628 (1985-07-01), Haour et al.

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