Abstract
Abstract The current efficiency in a small laboratory aluminium electrolysis cell was measured as a function of cell current, cathode alloy composition (Al–Cu) and bath temperature. The current efficiency was found to increase with increasing current density, increasing copper content in the cathode alloy and decreasing temperature. The diffusivity of aluminium dissolved in the bath was calculated to be 9·10−5cm2 s−1 at 970°C. Practical implications of the results on the current efficiency in industrial cells are discussed.
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