Title: Process for improving corrosion resistant characteristics of chrome plated aluminum and aluminum alloys

Abstract: The invention relates to a method for preparing aluminum and aluminum alloy objects for plating which results in an article whch exhibits improved corrosion resistant characteristics. The process includes anodizing the aluminum object in an acid bath, placing the anodized object in contact with a chemical which impregnates and is absorbed by the oxidized crystalline surface and finally exposing the treated aluminum object to heat so that the impregnating chemical is pyrolyzed to form an electronically conductive oxide thereby permitting the plating process while preserving an anodic coating of high ionic resistance.

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Inventors: Pryor, Michael J. (Woodbridge, CT, US)

Application Number: 895412
Filing Date: 1978-04-11
Publication_date: 1979-07-31
Assignee: Swiss Aluminium Ltd. (Chippis, CH)
Primary Class(es): 428/472 205/171, 205/198, 205/199, 205/201, 428/702
Other Classes:
US Patent Ref:

3971710	Jul, 1976	Romankiw	204/42.
4066816	Jan, 1978	Sheasby et al.	428/469.
4067782	Jan, 1978	Bailey et al.	204/42.
4070255	Jan, 1978	Hasegawa et al.	204/42.
4090880	May, 1978	Chu et al.	204/42.

Other Refs:
Primary Examiner: Ansher, Harold
Assistant Examiner:
Attorney: Bachman and LaPointe