Standard Test Method for Measuring Waste Glass or Glass Ceramic Durability by Vapor Hydration Test

Importancia y uso:

5.1 The VHT can be used to study the corrosion of glass and glass ceramic waste forms under conditions of high temperature and contact by water vapor or thin films of water. This method may serve as an accelerated test for some materials, since the high temperatures will accelerate thermally activated processes. A wide range of test temperatures have been reported in the literature –40 °C (Ebert et al, 2005 (3), for example) to 300 °C (Vienna et al, 2001 (4), for example). It should be noted that with increased test temperature comes the possibility of changing the corrosion rate determining mechanism and the types of phases formed upon alteration from those that occur in the disposal environment (Vienna et al, 2001 (4)).

5.2 The VHT can be used as a screening test to determine the propensity of waste forms to alter and for relative comparisons in alteration rates between waste forms.

Subcomité:

C26.13

Referida por:

C1174-20

Volúmen:

12.01

Número ICS:

81.040.10 (Raw materials and raw glass)

Palabras clave:

alteration; durability; glass; glass ceramics; hydration; hydrothermal; performance; rate; reaction; repository; test; vapor; waste; water;