Abstract

The interactions between glass and water are many-sided and the results of such interactions depend on many parameters. It is well known that the stability of glass in water depends on the composition of the glass. Amongst the further parameters the temperature plays a specific role because primarily the temperature determines whether the interaction takes place with water vapour or with liquid water. In general the durability of glass in water is very high. The good condition of the surface of ancient glasses, exposed to water for a long time, proves this very impressively. However, this impression usually does not show that complicated interactions between glass and water occur yielding a remarkable change of the structure and microstructure of the glass surfaces. These phenomena shall be discussed in detail. These interactions are influenced by the compounds dissolved in the water. This must be taken into consideration especially when judging the long-term behaviour of glass in a limited aqueous volume. This problem is important for some practical cases. It was found that the corrosion of glass continues even after the dissolved components have reached their saturation, however, with a lower rate. Two practical examples shall be discussed, the behaviour of HLW-containing glass in a stock and the behaviour of glass fibers in human tissues.

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