Anodic protection systems and methods

Details Anodic protection systems and methods Anodic protection systems and methods

2006-02-14

2006-02-14

Bell, Bruce F. (Department: 1746)

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C204S229800, C204S230200, C204S230500, C204S267000, C204S268000, C204S278500

Reexamination Certificate

active

06998029

ABSTRACT:
Various systems and methods for protecting electrowinning anodes having electrocatalytically active coatings in a bank of electrolytic cells from being damaged by reverse currents. In the first embodiment, one or more auxiliary power sources are provided that, when triggered by one or more predetermined conditions being met, keep the bank of electrolytic cells in an electrical state that is relatively harmless to the anodes having electrocatalytically active coatings. In a second embodiment, the invention is directed to a method of maintaining the polarization of anodes in an electrowinning cell positive of the cathodes (i.e. in a potential region where the anode coating is not susceptible to significant damage). In a final embodiment, the invention is directed to various methods for the installation of replacement anodes and maintenance of electrowinning cells.

REFERENCES:
patent: 5632872 (1997-05-01), Dattilo
patent: 6139705 (2000-10-01), Brown, Jr. et al.
patent: 6344124 (2002-02-01), Bhatnagar
patent: 6368489 (2002-04-01), Hardee et al.

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