Glass. Hydrolytic resistance of glass grains at 98 °C. Method of test and classification
81.040.01 - Glass in general
Reemplaza a: BS 3473-2:1987
This document specifies
a method for determining the hydrolytic resistance of glass
grains at 98 °C. The resistance is measured and expressed by
the volume of acid required for titration of the alkali
extracted from the unit mass of glass, and can also be
expressed by the amount of sodium oxide equivalent to this
volume of acid, and
a classification of glass according to the hydrolytic
resistance determined by the method of this document.
This document is intended for use on the less resistant types of
glass, such as soda-lime glass.
For the more resistant glasses, e.g. borosilicate glass, the
method specified in
ISO 720 is more suited.
It is emphasized that there is no exact correlation between
the classification laid down in this document and that laid down
ISO 720 , and it is,
therefore, essential to identify which classification is being
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