Method for heating aluminum baths

Details Method for heating aluminum baths Method for heating aluminum baths

1982-08-23

1983-05-10

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204237, 204241, 204274, 204DIG9, C25D 1706, C25D 1718

Patent

active

043828442

ABSTRACT:
Aluminum electroplating installations containing aprotic electrolyte bath systems typically require an electrolyte operating temperature of over 80.degree. C. in order to achieve useable aluminum precipitations. The warming-up and heating of such aluminum electrolyte baths has heretofore been accomplished with indirect heating methods, such as surrounding the baths with a heating jacket or by conducting electrolyte out of the bath through a heat exchanger and then returning the heated electrolyte. The present invention concerns a more efficient heating method whereby Joule's heat is used to heat an aprotic electrolyte bath. Accordingly, at least two electrodes are immersed into the electrolyte and charged with alternating pulses by a square wave pulse generator such that a heating current flows through the electrolyte. The anodes and cathodes of the aluminization electrolyte bath are preferably used as the heating electrodes.

REFERENCES:
patent: 4053383 (1977-10-01), Dotzer et al.
patent: 4066515 (1978-01-01), Stoger et al.
patent: 4176034 (1979-11-01), Stoger et al.

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