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., Golden, CO (USA)
- 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
140700* -- Solar Thermal Power Systems
ALKALI METAL COMPOUNDS
ALLOYS
CARBON COMPOUNDS
CARBONATES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION
CORROSIVE EFFECTS
ENERGY STORAGE
EQUIPMENT
HEAT STORAGE
INCONEL 600
INCONEL ALLOYS
IRON ALLOYS
LITHIUM CARBONATES
LITHIUM COMPOUNDS
MATERIALS
MOLTEN SALTS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
OXYGEN COMPOUNDS
SALTS
SENSIBLE HEAT STORAGE
STORAGE
THERMAL ENERGY STORAGE EQUIPMENT
VERY HIGH TEMPERATURE