Process for coating aluminum with zinc

Details Process for coating aluminum with zinc Process for coating aluminum with zinc

1983-05-03

1985-02-12

Morgenstern, Norman

Coating processes

Nonuniform coating

Mask or stencil utilized

148 627, 427328, 4273768, 427436, 427406, 427287, B05D 500

Patent

active

044991231

ABSTRACT:
A two-step process for coating a surface of an aluminum article with zinc, wherein the surface is initially exposed to a zincate bath under relatively weak zinc-depositing conditions, and then further exposed to a zincate bath under stronger zinc-depositing conditions (lower ZnO concentration and/or higher temperature), to establish thereon an adherent coating of metallic zinc. The coated article may be heated to effect diffusion of the zinc into the aluminum for producing a zinc-enriched region adjacent the surface to protect the surface against corrosion.

REFERENCES:
patent: 3216835 (1965-11-01), Saubestre
patent: 3235404 (1966-02-01), Mickelson et al.
patent: 3329522 (1967-07-01), Saubestre et al.
patent: 3982055 (1976-09-01), Howard

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