Aluminum alloy cathode plate for electrowinning of zinc

Details Aluminum alloy cathode plate for electrowinning of zinc Aluminum alloy cathode plate for electrowinning of zinc

1994-08-01

1996-03-12

Gorgos, Kathryn

Electrolysis: processes, compositions used therein, and methods

Electrolytic synthesis

Preparing single metal

C25C 116

Patent

active

054983223

ABSTRACT:
Cathode plate aluminum sheet product for use in electrowinning of zinc in sulfuric acid containing electrolyte bath comprises an alloy (a) consisting essentially of about 0.2 to 0.5% magnesium, 0.15% maximum silicon, 0.1% maximum iron, 0.05% maximum copper, and 0.05% maximum zinc, the balance substantially aluminum and incidental elements and impurities, the aluminum amounting to at least 99% of aluminum alloy, or (b) consisting essentially of about 0.08 to 0.23% silicon, 0.1% maximum iron, 0.05% maximum copper, 0.05% maximum magnesium, 0.05% maximum zinc, the balance substantially aluminum and incidental elements and impurities, the aluminum being at least 99.4% of said alloy. The sheet products are work hardened by cold rolling and have a minimum yield strength of at least 14 ksi, preferably at least 15 or 16 ksi, and an electrical conductivity of preferably 58% I.A.C.S. or more together with good corrosion resistance. The combination of properties enables longer cathode service life in the harsh sulfuric acid containing electrolytic cell.

REFERENCES:
patent: 1255433 (1918-02-01), Laist et al.
patent: 2443112 (1948-06-01), Morin
patent: 3579431 (1971-05-01), Jasberg

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