FURTHER DEVELOPMENT OF A TECHNIQUE FOR THE PREPARATION OF METALLOGRAPHIC SPECIMENS OF ZIRCALOY
Etching solutions of two types are described for removal of perturbed surface layers of atoms from Zircaloy samples, following fine polishing with diamond paste. One of the solutions contains nitric acid, water, hydrofluoric acid, and acetic acid; the other solution contains nitric acid, water, hydrofluoric acid, and chromic acid. Etching time varies from 1.5 to 4.0 min, depending on the metal sample. An anodization technique is also described for use with fine-grained alloys which are insensitive to polarized light. An anodizing solution, containing water, acetic acid, sulfuric acid, glycerine, and chromic anhydnide is prepared; the sample is anodized in this solution from 2 to 4 sec, at 20 to 60 v. This process improves grain contrast under polarized light. (T.F.H.)
- Research Organization:
- CISE, Milan
- NSA Number:
- NSA-15-014690
- OSTI ID:
- 4057657
- Journal Information:
- Energia nucleare (Milan), Journal Name: Energia nucleare (Milan) Vol. Vol: 8
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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