AN EVALUATION OF THE SULFURIC ACID-SODIUM NITRITE ETCH FOR ZIRCALOY-2
Preliminary experiments indicate that there are no significant differences in the corrosion rates of zirconium or Zircaloy-2 after etching with the nitric--hydrofluoric solution or the sulfuric--nitrite solution, provided proper etching and washing techniques are followed. Incomplete removal of the residual etchant is deleterious to the corrosion resistance; however, this effect in the case of the sulfuric--nitrite solution is not as pronounced as in the case of the nitric--hydrofluoric acid solution. The anticipated advantages in the new etch were not completely realized. Additional development aimed at modifying the sulfuric--nitrite etch would have to be performed in order to overcome the disadvantages before recommendation for the adoption of the etch could be made. (auth)
- Research Organization:
- Westinghouse Electric Corp. Atomic Power Div., Pittsburgh
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AT(11-1)-GEN-14
- NSA Number:
- NSA-14-018127
- OSTI ID:
- 4147301
- Report Number(s):
- WAPD-MDM-2(Rev.)
- Country of Publication:
- United States
- Language:
- English
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