INHIBITION OF CORROSION OF 304-L IN HNO{sub 3}-HF MIXTURES WITH ALUMINUM
Data are presented on the aluminum to fiuoride ratios necessary to achieve satisfactory inhibition of the corrosion of type 304-L stainless steel in HNO/sub 3/--HF mixtures. Stainless steel samples were exposed to boiling solutions containing HNO/sub 3/, HF, and Al(NO/sub 3/)a at various concentrations. The data indicate that an aluminum-to-fluoride mole ratio of 5 to 6 is sufficient to produce almost complete inhibition in O.O1 M HF solutions with HNO/sub 3/ concentrations up to 10 molar. A mole ratio of 5 to 6 also produced good inhibition in 4 M HNO/sub 3/ solutions with HF concentrations up to O.1 molar. Samples exposed in the vapor phase and at the interface of boiling solutions of aluminum-inhibited HNO/sub 3/--HF acid did not exhibit any evidence of accelerated attack. (P.C.H.)
- Research Organization:
- General Electric Co. Hanford Atomic Products Operation, Richland, Wash. (US)
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- AT(45-1)-1350
- NSA Number:
- NSA-16-024120
- OSTI ID:
- 4805848
- Report Number(s):
- HW-73211
- Country of Publication:
- United States
- Language:
- English
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