The wetting properties of graphiteGraphite were measured with the immersion/emersion technique in a high temperature aluminaAlumina reductionReduction cell. The wetting was measured at untreated, polarised and anode effectAnode effect polarised samples. Most measurements were made in melts with 1 wt% aluminaAlumina, although some measurements were performed at higher aluminaAlumina content. As long as passivation (i.e. anode effect) was not initiated polarisation improved the wettability significantly and the wetting increased with increased polarisation. AnodesAnode polarised to anode effect exhibited consistently very poor wetting. Most of the decrease in wetting occurred during the first few seconds of the anode effectAnode effect, with full de-wetting from about 60 s.
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- The Influence of Polarisation on the Wetting of Graphite in Cryolite-Alumina Melts
Ingrid A. Eidsvaag
Geir M. Haarberg
in-adhesives, MKVS, Zühlke/© Zühlke, Nordson/© Nordson, ViscoTec/© ViscoTec, Hellmich GmbH/© Hellmich GmbH