Abstract
The positive temperature coefficient of the surface tension of molten zinc has been confirmed experimentally with a maximum-bubble-pressure (MBP) system. The possible effects of the high vapor pressure of molten zinc on the surface tension have been checked by making the measurements at atmospheric pressure and repeating at 1,800 Torr. The measurements were made on 99.999 pct zinc in the range from 436 to 806°C in an improved twin-tube MBP system. Results are that, over the given temperature range, the surface tension (γ) of zinc is given by γ (dynes/cm) = 839.7 − 125.7 e−0.00941(T−419.5) The temperature (T) is in degrees centigrade. A total of 130 experimental values were determined with a correlation index of 0.98 with the equation. Comparisons of this result with others in the literature are discussed.
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Falke, W.L., Schwaneke, A.E. & Nash, R.W. Surface tension of zinc: The positive temperature coefficient. Metall Trans B 8, 301–303 (1977). https://doi.org/10.1007/BF02657660
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DOI: https://doi.org/10.1007/BF02657660