Chemistry: electrical and wave energy – Processes and products
Patent
1976-07-22
1978-05-16
Tufariello, T. M.
Chemistry: electrical and wave energy
Processes and products
204205, 204228, C25D 1102, C25D 1104, C25D 1112
Patent
active
040897567
ABSTRACT:
A method and system for anodizing and particularly for hard anodizing of aluminum and aluminum alloy articles in which a wide range of operating voltages can be employed without danger to personnel and without burning of the articles. For continuous (dynamic) processing, a plurality of electrolyte-containing tanks are employed with an associated cooling system for maintaining the electrolyte at a low operating temperature. Each tank, cathode, electrolyte and cooling apparatus are electrically insulated from ground, while each cathode, which can be the tank itself, is connected to a predetermined negative potential of a power source which source comprises one or more separate power supplies. A conductive conveyor system is provided to carry articles through the several tanks and is connected to ground to which is also connected a positive terminal or terminals of the power source. For batch (static) anodizing, a single electrolyte-containing tank is employed with an associated cooling system, the tank, cathode, electrolyte and cooling system being isolated from electrical ground, with the articles to be anodized being grounded. A negative terminal of a power supply is connected to the cathode, which can be the tank itself, while a positive terminal of the power supply is connected to ground.
REFERENCES:
patent: 2920018 (1960-01-01), Miller
patent: 3391073 (1968-07-01), Rusch et al.
patent: 3597339 (1971-08-01), Newman et al.
patent: 3745100 (1973-07-01), Lasser
patent: 3827951 (1974-08-01), Kallianides et al.
Lerner Moisey M.
Morse James H.
Sanford Process Corporation
Tufariello T. M.
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