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Interfacial tension between aluminum and

M. KORENKO, M. ONDERCIN

2026enaluminum electrolysiscryolite meltsinterfacial tensionmolten saltscapillary methodHall–Heroult process

Abstract

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The interfacial tension between aluminum and cryolite melts containing different salt additions has been measured by the capillary depression method. This technique involves measuring the capillary depression that occurs when a capillary is moved vertically down through the molten salt layer, passing through the salt/metal interface. The interfacial tension demonstrated a strong dependency on the n(NaF)/n(AlF3) ratio (cryolite ratio, CR). At a cryolite ratio of 2.28 (80 wt.% Na3AlF6 + 10 wt.% AlF3 + 10 wt.% Al2O3 // Al, t = 1000 /C176C), the interfacial tension was measured at 546 mN m )1, reducing to 450 mN m )1 at a cryolite ratio of 4.43 (80 wt.% Na3AlF6 + 10 wt.% NaF + 10 wt.% Al2O3 // Al, t = 1000 /C176C). Under current flow conditions, the tension at the n(NaF)/n(AlF3) ratio of 2.28 decreased from 546 mN m )1 at zero current to 518 mN m )1 at 0.112 A cm )2, and a similar trend was noted for the cryolite ratio of 4.43, decreasing from 450 mN m )1 to 400 mN m )1 at the same current density. Conversely, the interruption of electrolysis resulted in an increase in interfacial tension for these systems.

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Cite This Work

@article{c71592ad-1d55-4a0b-9cd1-4b2862c726ac,
  title={Interfacial tension between aluminum and},
  author={M. KORENKO and M. ONDERCIN},
  year={2026},
  language={en}
}
TY  - JOUR
TI  - Interfacial tension between aluminum and
AU  - M. KORENKO
AU  - M. ONDERCIN
PY  - 2026
LA  - en
ER  -

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