The files below may be used to model the corrosion of various refractories used in glass melting furnaces. Those listed under "Silica corrosion" are designed to simulate corrosion of low-density silica bricks used in furnace crowns. The corrosive mechanism is assumed to be

 

M₂O(in glass melt) + H₂O(g, combustion gas) 2MOH(g), M = Na or K (1)

2MOH(gas) M₂O(dissolved in liquid SiO₂) + H₂O(g, combustion gas) (2)

Files listed under "Alumina corrosion" are designed to simulate corrosion of high-purity alumina (either or ) according to the reactions below. Similar reactions apply to alumina corrosion by KOH (although the temperature ranges differ). Details can be found in Ref. 2.

NaOH reaction with alumina:

T < 2158 K:    2 NaOH(g) + 9 Al₂O₃ 2 NaAl₉O₁₄ + H₂O(g, combustion gas)

T > 2158 K:    2 NaOH(g) Na₂O(in Al₂O₃-rich liquid) + H₂O(g, combustion gas)

NaOH reaction with alumina:

4 NaAl₉O₁₄ + 2 NaOH(g) 3 Na₂Al₁₂O₁₉ + H₂O(g)

NaAl₉O₁₄ + 8 NaOH(g) 9 NaAlO₂ + 4 H₂O(g)

Silica Corrosion (See Ref. 1 for more details.)

Low-density silica corrosion by NaOH (Na-Ca-Si-O-C-H-N system) (File format: ChemSage)

Low-density silica corrosion by KOH (K-Si-O-C-H-N system) (File format: ChemSage)

Alumina Corrosion (See Ref. 2 for more details.)

Alumina refractory corrosion by NaOH (Na-Al-O-C-H-N system) (File format: ChemSage)

Alumina refractory corrosion by KOH (K-Al-O-C-H-N system) (File format: ChemSage)

References:

1. M. D. Allendorf, K. E. Spear "Thermodynamic Analysis of Refractory Corrosion in Glass Melting Furnaces," J. Electrochem. Soc., 148, B59 (2001).
2. K. E. Spear, M. D. Allendorf "Thermodynamic Analysis of Alumina Refractory Corrosion by Sodium or Potassium Hydroxide in Glass Melting Furnaces," J. Electrochem. Soc., 149, B551-B559, 2002.