Guillaume Lambotte, Patrice Chartrand
The corrosion of the cathode refractory lining in electrolysis cells, partly due to the cryolite bath, can shorten the lifespan of the cell. This corrosion is usually studied with laboratory tests and cathode autopsies of shutdown cells, but the results might not correspond to the reactions taking place in service. The simplified corrosion problem (AI20 3-Si0 2 representing the alumino silicate refractory, NaF-AIF3 representing the cryolite bath) corresponds to the reciprocal system AI203-Na20-Si02-AIF3-NaF-SiF4. The thermodynamic modelling of this system permits the calculation of complex chemical equilibrium occurring at the service temperature. The reciprocal system has been assessed using the Moditied Quasichemical Model in the Quadruplet Approximation (MQMQA), which takes into account both first-nearest-neighbour (FNN) and second-nearest-neighbour (SNN) short-range order (SRO) and allows the modelling of the strongly ordered oxyfluoride liquid solution. A unique set of model parameters is used to reproduce the experimental data. The results of the thermodynamic modelling of the AI20rNa20-SiOrAIFrNaF-SiF4 system are presented here.
@article{d76c3110-633f-429e-9e90-3b5587198bfc,
title={A Thermodynamic Approach to the Corrosio},
author={Guillaume Lambotte and Patrice Chartrand},
year={2026},
language={en}
}TY - JOUR TI - A Thermodynamic Approach to the Corrosio AU - Guillaume Lambotte AU - Patrice Chartrand PY - 2026 LA - en ER -
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