Corrosion behaviour of lead-copper alloys in sulphuric acid for battery applications View Full Text


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Article Info

DATE

1991-11

AUTHORS

S. Shah, R. N. Grugel, B. D. Lichter

ABSTRACT

The corrosion behaviour in sulphuric acid of monotectic Pb-63 wt % Cu, hyper-monotectic Pb-30 wt % Cu, and Pb-10 wt % Cu was investigated and compared to that of Cu, Pb, as well as Pb−Ca, and Pb−Ca−Sn battery-grid alloys. On anodic polarization of pure Cu and Pb−Cu alloys. dissolution of the copper phase markedly increases as the potential is increased above the Cu/Cu2+ reversible potential, which is above the passive potential for lead and lead battery-grid alloys. A limiting current and pseudo-passive transition attains, and the pseudo-passive current decreases with decreasing bulk copper content of the alloy. Extensive selective leaching of copper from the 30 wt % Cu alloy produced a highly porous layer of spongy lead, and the subsequent anodic polarization behaviour (without repolishing the sample surface) showed a reduction in pseudo-passive corrosion rates to values ∼20 times greater (referred to unit geometric area) than the passive current of pure Pb and lead battery-grid alloys. This difference was attributed partly to dissolution of redeposited copper but mainly to the large effective surface area of the remaining porous lead network. The possible use of Pb−Cu alloys as high-conductivity battery-grid alloys is discussed. More... »

PAGES

1013-1022

References to SciGraph publications

  • 1979-01. Monotectic composite growth in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1988-11. Directional solidification of lead-copper immiscible alloys in a cyclic gravity environment in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • Identifiers

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    http://scigraph.springernature.com/pub.10.1007/bf01077588

    DOI

    http://dx.doi.org/10.1007/bf01077588

    DIMENSIONS

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