Process for continuous anodizing of aluminum

Chemistry: electrical and wave energy – Processes and products

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Details

204 42, 204198, 204202, 204205, C25D 1104, C25D 1700, C25D 1704

Patent

active

041893603

ABSTRACT:
This invention relates to a process for mass-production formation of aluminum oxide coatings on a plurality of aluminum or aluminum alloy articles by means of continuous anodic oxidation. The process is characterized by connecting one or more of the aluminum articles to the positive terminal of a power supply capable of maintaining constant current. Depending on the volume of work to be anodized, two or more power supplies are utilized with the negative terminals connected to common cathodes of a common anodizing tank and the positive terminals being electrically isolated from each other. Individual racks containing one or more aluminum articles are brought into contact with the positive terminals of the power supplies. Contact is made through a series of segmented bus bars of positive electrical potential corresponding to the number of power supplies and a system is used to move the racks through the common anodizing tank. Thus, continuous anodizing of one or a plurality of articles is accomplished.

REFERENCES:
patent: 3079308 (1963-02-01), Ramirez et al.
patent: 3592754 (1971-07-01), Aihara
patent: 4089756 (1978-05-01), Lerner et al.

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