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On-line sensing of aluminium in zinc hot-dip galvanizing baths using novel techniques

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Abstract

Measurement and control of the dissolved aluminium levels in zinc hot-dip galvanizing baths, is of great importance to the steel industry. Current attempts at the cost-effective production of an aluminium sensor, for use in molten zinc, have not proved to be very successful. Possible sensor systems, based upon two contrasting electrolytes are proposed within this paper.

A sensor based upon thein-situ formation of sodium aluminium chloride, through D.C charging, is proposed. The charging process and EMF versus time relationship, for different aluminium concentrations, has been investigated.

A second system, based upon the trivalent ion conducting electrolyte, aluminium tungstate, has also been studied. Aluminium tungstate, Al2(WO4)3, has been prepared by a simple calcination step. Modification of the structure of the electrolyte, to improve its conduction properties, has been investigated.

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Authors and Affiliations

  1. University of Cambridge, United Kingdom

    S. L. Finch & R. V. Kumar

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  1. S. L. Finch
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  2. R. V. Kumar
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Finch, S.L., Kumar, R.V. On-line sensing of aluminium in zinc hot-dip galvanizing baths using novel techniques. Ionics 5, 299–310 (1999). https://doi.org/10.1007/BF02375854

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  • DOI: https://doi.org/10.1007/BF02375854

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