Protective coating for aluminum products

Details Protective coating for aluminum products Protective coating for aluminum products

1976-07-27

1978-07-11

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

427292, 427327, 72 46, 72 42, 252 32, C23F 700

Patent

active

040999890

ABSTRACT:
This invention relates to the formation of a hydrophobic and usually oleophilic coating on an aluminum surface by mechanically deforming or upsetting the aluminum surface to disrupt the natural oxide coating in the presence of alkaline agents and a long chain aliphatic carboxylic acid or other equivalent long chain aliphatic carboxylate compounds. Preferably, the carboxylic acid and alkaline agent are incorporated into a metal-working lubricant which is maintained on the aluminum surface during fabrication, such as rolling, so that the hydrophobic coating is formed simultaneously with fabrication and thereby avoid the necessity of a separate coating operation.

REFERENCES:
patent: 2413220 (1946-12-01), Elder et al.
patent: 2963391 (1960-12-01), Kubie
patent: 3098294 (1963-07-01), Schapiro
patent: 3105400 (1963-10-01), Goppelt
patent: 3836467 (1974-09-01), Jones
patent: 3923671 (1975-12-01), Knepp

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