Thermodynamic Interaction between Zinc and the Dilute Solutes Antimony, Bismuth, and Cadmium in Solution In Liquid Lead

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Abstract
The activity of zinc has been measured in dilute liquid lead alloys containing small additions of a third element. The study which was conducted in the temperature range 450°–650°C employed a galvanic cell with a liquid chloride electrolyte. The concentration cell was The activity of zinc in the dilute lead‐zinc binary shows Henry's law behavior at concentrations up to 0.0375 mole fraction zinc. The activity of zinc in lead exhibits a strong positive deviation from Raoult's law, the activity coefficient at infinite dilution being 11.4 at 550°C. Measurements have been made of the influence of antimony, bismuth, and cadmium on the activity coefficient of zinc in liquid lead. Antimony markedly decreases the activity coefficient, while cadmium and bismuth slightly decrease the activity coefficient of zinc in liquid lead. These results have been summarized in terms of first‐order interaction parameters which can be expressed as a function of temperature by the relations

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