Treatment of substrate prior to autodeposition

Details Treatment of substrate prior to autodeposition Treatment of substrate prior to autodeposition

1978-06-21

1980-04-22

Esposito, Michael F.

Coating processes

With pretreatment of the base

Etching, swelling, or dissolving out part of the base

427327, 427435, 427341, 148 615R, 148 615Z, B44L 198, C23F 700, B05D 300, B05D 118

Patent

active

041996240

ABSTRACT:
A metallic substrate is cleaned and then pretreated with an aqueous acidic solution for the purpose of reducing or preventing the formation of pinholes in a subsequently applied coating formed by an acidic aqueous coating composition containing dispersed particles of an organic coating-forming material and of the type which forms on a metallic surface immersed therein an organic coating which increases in thickness the longer the surface is immersed in the coating composition.

REFERENCES:
patent: 1109670 (1914-09-01), Feidt
patent: 1279101 (1918-09-01), Goravell
patent: 2304299 (1942-12-01), Boyle et al.
patent: 3585084 (1971-06-01), Steinbrecher
patent: 3795546 (1974-03-01), Hall et al.
patent: 3973998 (1976-08-01), Datta et al.
Kirk-Othmer, Ency. of Chem. Tech., 2nd Ed., vol. 13, p. 293 (1967).
Burns et al., Protective Coatings for Metals, p. 30 (1955).

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