Treating autodeposited coating with Cr composition

Details Treating autodeposited coating with Cr composition Treating autodeposited coating with Cr composition

1981-09-04

1987-01-20

Morgenstern, Norman

Metal treatment

Compositions

Heat treating

427341, 427375, 4273884, 427435, C23C 2224, C23C 2267

Patent

active

046378391

ABSTRACT:
In a process wherein a resinous coating is formed on a metallic surface by immersing the surface in an acidic aqueous coating composition containing dispersed particles of resin, wherein said composition forms on said surface a resinous coating which increases in thickness the longer the surface is immersed in the composition and wherein the resinous coating is contacted with an aqueous solution containing Cr to improve properties of the resinous coating, the improvement comprising contacting said resinous coating with an acidic aqueous solution prepared by combining a hexavalent Cr-containing compound, an aqueous mixture of hexavalent chromium/reduced chromium, and an acid or a soluble salt thereof.

REFERENCES:
patent: 3063877 (1962-11-01), Schiffman
patent: 3585084 (1971-06-01), Steinbrecher et al.
patent: 3592699 (1971-07-01), Steinbrecher et al.
patent: 3647567 (1972-03-01), Schweri
patent: 3795546 (1974-03-01), Hall et al.

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