Corrosion of selected alloys in eutectic lithium-sodium-potassium carbonate at 900C
There is an ongoing interest at the US Department of Energy in using molten salts as high temperature sensible heat storage media in advanced solar thermal systems. In this report, the compatibility of selected alloys in eutectic lithium-sodium-potassium carbonate, the salt that will be used in the near-term engineering experiments, has been evaluated at 900C. Several combinations of oxidation potential and acidity in the salt were used in the experiments. It was found that the extent of corrosion was dramatically lower for experiments conducted at high oxygen potential compared to experiments at low oxygen potential. For Inconel 600, Hastelloy N, and nickel the results indicated that corrosion rates substantially below 1 mm/year/side might reasonably be expected and that a reevaluation of alloys the showed poor corrosion resistance under low oxygen potential would be advisable.
- Research Organization:
- Solar Energy Research Inst. (SERI), Golden, CO (United States)
- DOE Contract Number:
- AC02-83CH10093
- OSTI ID:
- 6211643
- Report Number(s):
- SERI/PR-255-2561; ON: DE86004417
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
MOLTEN SALTS
CORROSIVE EFFECTS
THERMAL ENERGY STORAGE EQUIPMENT
MATERIALS
ALLOYS
CORROSION
INCONEL 600
LITHIUM CARBONATES
SENSIBLE HEAT STORAGE
VERY HIGH TEMPERATURE
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
ENERGY STORAGE
EQUIPMENT
HEAT STORAGE
INCONEL ALLOYS
IRON ALLOYS
LITHIUM COMPOUNDS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
OXYGEN COMPOUNDS
SALTS
STORAGE
140700* - Solar Thermal Power Systems