CORROSION STUDY OF REPLACEMENT MATERIALS FOR HAZARDOUS LOW LEVEL WASTE PROCESSING TANKS
New waste tanks are to be constructed in H-area to store hazardous low level wastes. AISI Type 304L (304L) stainless steel was recommended as a suitable material of construction for these tanks. Cyclic polarization and coupon tests were performed to evaluate the corrosion resistance of 304L over a wide range of waste tank environments. The results of both tests indicated that 304L was not susceptible to attack under any of these conditions. Comparison tests were also performed with ASTM A537 carbon steel (A537) and Incoloy 825. The carbon steel corroded severely in some of the environments, while Incoloy 825 did not corrode. These tests, along with those for 304L, verified the correlation between cyclic polarization and coupon tests. Electrochemical Impedance Spectroscopy (EIS) was performed to monitor the breakdown of the protective oxide film on the surface of the material as a function of time and temperature. These results also correlated with those from the cyclic polarization and coupon tests.
- Research Organization:
- SRS
- Sponsoring Organization:
- DOE
- DOE Contract Number:
- AC09-08SR22470
- OSTI ID:
- 967271
- Report Number(s):
- WSRC-TR-91-138
- Country of Publication:
- United States
- Language:
- English
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