Method of making corrosion inhibited metal

Details Method of making corrosion inhibited metal Method of making corrosion inhibited metal

1983-11-07

1986-01-07

Metz, Andrew H.

Chemistry: electrical and wave energy

Processes and products

204 383, 204 56R, 2041802, C25D 902

Patent

active

045632537

ABSTRACT:
A metal surface is passivated, or rendered resistant to corrosion, by a dense, intimately adherent overlayer of an insoluble, non-reactive compound comprised of an organic compound complexed with the surface layer of metal of the underlying substrate. The overlayer is formed by first forming a thin oxide layer on the substrate, such as by anodization, and then treating the substrate by anodically depositing and concurrently reacting the complex-forming organic compound. Preferably, the substrate is steel, the anodization and treating baths are borate solutions, and the organic compound is 8-hydroxyquinoline.

REFERENCES:
patent: 3734784 (1973-05-01), Berebay et al.
patent: 4180442 (1979-12-01), Byrd
patent: 4399021 (1983-08-01), Gillich et al.
Wehubner et al., The Practical Anodizing of Aluminum, McDonald and Evans, London, 1960, p. 21.
Metal Finishing Guidebook and Directory for 1978, Metals and Plastics Publications, Inc., Hackensack, N.J., pp. 555-556.

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