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The corrosion behaviour of lead-calcium-tin alloys has been examined at two anodization potentials that correspond, respectively, to overcharge and to passivation by PbO conditions. The role of tin on the passivation phenomenon is examined in detail, while the evolution of hardening and microstructure is followed on the same samples, namely, grids (expanded and gravity cast) with different tin levels...
Lead/acid batteries with tubular grids for the positive electrodes give flatter discharge curves and higher cycle life than batteries using flat plates. Most tubular grids for motive-power batteries contain 9–11 wt.% antimony. Recently, alloys with 1–6 wt.% antimony have been used for reduced maintenance batteries. Sealed, valve-regulated batteries with tubular positive grids for motive power, telecommunications,...
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