Reducing or avoiding pinhole formation in autodeposition on zinc

Details Reducing or avoiding pinhole formation in autodeposition on zinc Reducing or avoiding pinhole formation in autodeposition on zinc

1992-10-21

1994-04-05

Owens, Terry J.

Coating processes

With pretreatment of the base

Metal base

427435, 4274431, B05D 300

Patent

active

053003233

ABSTRACT:
Pinhole and blister formation during autodeposition coating of galvanized steel and similar zinciferous surfaces can be greatly reduced by exposing the zinciferous surfaces to a pinhole inhibiting aqueous HF solution containing a suitable additive before using an autodeposition process itself. The most effective additives are boric acid, polyphosphonic acids, and polyethyleneimine.

REFERENCES:
patent: 3592699 (1971-07-01), Steinbrecher et al.
patent: 3617368 (1971-11-01), Gibbs et al.
patent: 3922451 (1975-11-01), Anschutz et al.
patent: 4093780 (1978-06-01), LeRoy
patent: 4108817 (1978-08-01), Lochel, Jr.
patent: 4178400 (1979-12-01), Lochel, Jr.
patent: 4199624 (1980-04-01), Smith
patent: 4242379 (1980-12-01), Hall et al.
patent: 4243704 (1981-01-01), Hall et al.
patent: 4313861 (1981-02-01), Bassett et al.
patent: 4647480 (1987-03-01), Ahmed
patent: 5080937 (1992-01-01), Broadbent

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