Alloys for making electrode supports in lead accumulators

Details Alloys for making electrode supports in lead accumulators Alloys for making electrode supports in lead accumulators

1979-07-12

1981-03-03

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

429245, H01M 438

Patent

active

042538718

ABSTRACT:
Low antimony alloys of lead are used for casting electrode supports in lead accumulators. They include less than 4% antimony by weight to avoid various poisoning effects of antimony on the electrochemical processes involved. Such alloys tend to have grains of excessive size which can lead to brittle castings. To reduce the grain size the present invention includes an additive constituted by a rare earth or a mixture of rare earths, e.g. misch metal at between 0.001% and 1% by weight, and preferably at 0.2%. The invention also provides an electrode support cast from the alloy, an electrode including such a support and a lead acid battery including such electrodes.

REFERENCES:
patent: 3113020 (1963-12-01), Larsen
patent: 3912537 (1975-10-01), Peters
patent: 4008079 (1977-02-01), Bowers

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