Glass Surface Chemical Attack: A Short Summary
| Neutral pH: ion exchange equilibrium, surface glass network hydration. |
| GLASS–SiONa + H2O = GLASS–SiOH + Na+ + OH− |
| Acid pH: quick available ions exchange, no attack to silica network. |
| GLASS–SiONa + H3O+ = GLASS–SiOH + Na+ + H2O |
| Alkaline pH: silica network slow dissolution rate with a silica hydrated layer development. |
| GLASS–Si–O–Si–OH + OH− = GLASS-Si–O− + –Si–(OH)2 |