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U.S. Department of Energy
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CORROSION OF STAINLESS STEEL IN THOREX PROCESS SOLUTIONS

Technical Report ·
DOI:https://doi.org/10.2172/4192957· OSTI ID:4192957
The corrosion of 304L and 309SCb stainless steel was studied in HF--HNO/ sub 3/ solutions proposed for the Thorex process. Except for the dissolving and waste evaporation steps in the Thorex process, corrosion of 304L and 309SCb is not expected to exceed that experienced in the Purex process. To minimize the high initial corrosion rate of 309SCb in the boiling HF-- HNO/sub 3/ dissolving solution, a heel of thorium should be maintained in the dissolver. The corrosion rate of 304L in the low activity waste evaporator can be reduced by adding one mole of aluminum per mole of fluoride to the evaporator feed. (auth)
Research Organization:
Du Pont de Nemours (E.I.) & Co. Savannah River Lab., Aiken, S.C.
Sponsoring Organization:
USDOE
NSA Number:
NSA-14-009732
OSTI ID:
4192957
Report Number(s):
DP-429
Country of Publication:
United States
Language:
English