1 Scope
This part of GB/T 7962 specifies the test conditions, steps and classification methods for the resistance to acid of colourless optical glass.
This part is applicable to the test on resistance to acid of colourless optical glass.
2 Normative references
The following documents contain provisions which, through reference in this part of GB/T 7962, constitute provisions of this part. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest editions apply to this part.
GB/T 693 Chemical reagent - Sodium acetate trihydrate
GB/T 6682 Water for analytical laboratory use - Specification and test methods
HG/T 3476 Chemical reagent - Acetic acid 36%
3 Terms and definitions
For the purposes of this part, the following term and definition apply.
3.1
resistance to acid
RA
capability of glass to resist erosion of acid solution
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus and reagents
6 Sample
7 Test steps
8 Classification of results
