CORROSION RESISTANCE OF EXPERIMENTAL NICKEL-BASE ALLOYS UNDER HYDROFLUORINATOR CONDITIONS
Corrosion results from the experimental alloys have not provided any clearly defined compositional trends which could lead to improved alloy compositions. Corrosion results from the recent runs, along with results for INOR-8 from previous studies, have been summarized. In general, INOR-8 and HyMu- 80 are quite similar in their resistance to corrosion in the HF system. In some instances, INOR-8 was superior to HyMu-80; in other runs, the reverse was true. Accordingly, it is recommended that INOR-8 and HyMu-80 be evaluated individually for use in a single vessel process. Preliminary studies could be made by constructing a hydrofluorinator-fluorinator from the material of interest and subjecting it to alternate sparges of HF and F/sub 2/ under conditions simulating plant practice. The container itself would serve as the corrosion specimen and would be carefully examined at the conclusion of the cyclic operation. The importance of salt-bath composition on corrosion results is pointed out. The compositions conn any others. It is believed that the corrosion may be related to the solubility of HF in the salt. It has been shown that the solubility of HF in NaF-- ZrF/sub 4/ melts increases with increasing NaF content. In general, corrosion parallels this behavior. The corrosion is probably related to the solubility of the metal fluorides in the molten salt. For example, it is known that the solubility of NiF/sub 2/ is much greater in NaF--LiF--BeF/sub 2/ than in NaF-- ZrF/sub 4/. (R.J.S.)
- Research Organization:
- Battelle Memorial Inst., Columbus, Ohio
- DOE Contract Number:
- W-7405-ENG-92
- NSA Number:
- NSA-17-008740
- OSTI ID:
- 4735535
- Report Number(s):
- BMI-X-213
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- United States
- Language:
- English
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