Continuous anodizing of a cylindrical aluminum surface

Details Continuous anodizing of a cylindrical aluminum surface Continuous anodizing of a cylindrical aluminum surface

1991-12-06

1992-09-29

Tufariello, T. M.

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Coating predominantly single metal or alloy substrate of...

204224R, C25D 1104, C25D 1700

Patent

active

051511690

ABSTRACT:
A method and apparatus in which an aluminum-clad copper pin-piston is supported on the upper surface of a roller or a pair of rollers. As the roller rotates, it rotates the pin-piston and the surface of the roller carries an electrolyte. The positive side of a power supply is connected to the pin-piston and the negative side of the supply is coupled to the roller surface via the electrolyte bath. Anodizing current passes from the rotating roller to the rotating pin-piston via the electrolyte, which is continuously replenished. An anodized film forms on the aluminum surface of the pin-piston. Oxide growth rate and film thickness are controlled by controlling the current density and the duration of pin-piston contact with the charged roller.

REFERENCES:
patent: 2700212 (1955-01-01), Flynn et al.
patent: 3008892 (1961-11-01), Owen
patent: 4226281 (1980-10-01), Chu
patent: 4772361 (1988-09-01), Dorsett et al.
patent: 4948487 (1990-08-01), Imazu et al.

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