Process for continuous deposition of a zinc-aluminum coating on

Details Process for continuous deposition of a zinc-aluminum coating on Process for continuous deposition of a zinc-aluminum coating on

1986-10-15

1988-04-19

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

427310, 427433, C23C 2800

Patent

active

047387580

ABSTRACT:
There is disclosed a method of depositing a protective coating on a ferrous substrate comprising the steps of immersing the substrate in an electrolytic solution containing zinc chloride, a fluoride and at least one of NiCl.sub.2 and CoCl.sub.2, electrodepositing on said substrate a thin pre-coating comprising zinc, said electrolytic bath also functioning as a flux such that the thin electrodeposited coating comprising zinc will have thereon a flux coating as the substrate is removed from the electrolytic bath; removing the pre-coated substrate from the electrolytic bath, thereafter immersing the pre-coated substrate in a molten metal bath containing zinc so as to deposit a zinc-containing protective coating on said substrate, and removing said substrate from said molten bath.

REFERENCES:
patent: 3730758 (1973-05-01), Laidman
patent: 4390377 (1983-06-01), Hogg
patent: 4496612 (1985-01-01), McNutt et al.
F. A. Lowenheim, Electroplating, McGraw-Hill Book Co., New York, 1978, pp. 180-182.

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