Abstract
A concept for a sensor to monitor the antimony concentration in molten zinc has been tested. The sensor consists of a stabilized zirconia solid electrolyte with a auxiliary electrode to provide the sensitivity to antimony. Electromotive force measurements of the antimony activity in molten zinc using this cell are in agreement with values calculated from measurements of the zinc activity in zinc‐antimony alloys. However, the lifetime of the sensor is limited due to reaction of the auxiliary electrode with the molten zinc to form zirconium‐zinc intermetallic compounds.
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