Acid inhibitor treatment of substrate prior to autodeposition

Details Acid inhibitor treatment of substrate prior to autodeposition Acid inhibitor treatment of substrate prior to autodeposition

1979-07-10

1980-12-30

Smith, Ronald H.

Coating processes

With pretreatment of the base

Metal base

427435, 134 2, A23F 334

Patent

active

042423791

ABSTRACT:
A metallic substrate is pretreated with a composition containing an acid corrosion inhibitor prior to subjecting the substrate to an acidic aqueous autodepositing coating composition of the type which contains dissolved fluoride and ferric ions in order to improve the quality of the coating formed from said autodepositing composition by reducing or preventing the tendency of the composition to form coatings which contain pinholes or blisters on worked or roughened areas of the metallic surface.

REFERENCES:
patent: 1279101 (1918-09-01), Gravell
patent: 2304299 (1942-12-01), Boyle et al.
patent: 3585084 (1971-06-01), Steinbrecher et al.
patent: 3900601 (1975-08-01), Franz et al.
patent: 3973998 (1976-08-01), Datta et al.
Kirk-Othmer, Encycl. of Chem. Tech., 2nd Ed., vol. 6, pp. 324, 343, vol. 13, pp. 286, 287 (1965).

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