Summary
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1.
“Sodium carbonate paradoxes,” stronger destruction by carbonate solutions or a mixture of carbonate and hydroxide solutions, occur in the treatment of unstable silicate glasses of any composition. The destruction of more stable glasses by solutions containing carbonate ions is less than or equal to that observed in a hydroxide solution.
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2.
The specific action of a carbonate ion should be attributed mainly to its effect on the solution of silicate groups forming part of the structure of silicate glasses. To a lesser degree, destruction is promoted by the binding of cations present in the glass into difficultly soluble carbonates.
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3.
The capacity for destroying silicate glasses is also a strong characteristic of orthophosphate ions, which affect the destruction of the silicate groups and bind cations into difficultly soluble compounds. To a certain degree, fluoride and sulfate ions, which affect the same two processes, increase the destruction of glasses by alkali.
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Molchanov, V.S., Prikhid'ko, N.E. Corrosion of silicate glasses by alkaline solutions. Russ Chem Bull 8, 942–947 (1959). https://doi.org/10.1007/BF00916657
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DOI: https://doi.org/10.1007/BF00916657