Process for preheating and preparing ferrous metal for galvanizi

Details Process for preheating and preparing ferrous metal for galvanizi Process for preheating and preparing ferrous metal for galvanizi

1976-03-05

1979-02-20

Kendall, Ralph S.

Coating processes

With pretreatment of the base

Fluxing

427321, 148 26, C23C 102, C23C 112

Patent

active

041408217

ABSTRACT:
A process for simultaneously preheating and preparing a ferrous surface, prior to the depositing thereon of galvanized zinc coatings, replaces conventional fluxing techniques with the step of immersing a ferrous object in a bath of a molten salt or salts. The salts are chosen so that they are liquid at a temperature below that of the zinc coating step. The liquid acts as a non-fuming flux and preheat for the surface. Particular salts include metallic hydroxides and halides.

REFERENCES:
patent: 2278600 (1942-04-01), Wean
patent: 2428523 (1947-10-01), Marshall
patent: 2940870 (1960-06-01), Baldwin
patent: 3244551 (1966-04-01), Heins
patent: 3260619 (1966-07-01), Shoemaker et al.
patent: 3617455 (1971-11-01), Shoemaker
patent: 3816188 (1974-06-01), Chay
patent: 3936540 (1976-02-01), James
patent: 3941906 (1976-03-01), Bostroem
patent: 3952120 (1976-04-01), Horton
Galvanizing (Hot-Dip), Heinz Bablik, 3rd Edition, 1950, E & F.N. Spon Ltd, p. 58.

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