'Metals compatability with molten sodium-potassium nitrate salts
The objective of the Alternate Central Receiver program was to demonstrate the feasibility of the molten salt central receiver power system by conducting a series of experiments and using the results for commercial-scale designs. Experiments were conducted to provide data in the area of molten salt stability and materials compatibility which could be used in designing a commercial molten salt solar central receiver power system with a lifetime of 30 years or more. Three different categories of tests were conducted: (A) materials compatibility; (B) materials mechanical properties; and (C) dynamic testing. The first two categories were static materials immersion tests. The dynamic testing was conducted in a pumped molten salt loop covering a thermal gradient of 566/sup 0/C (1050/sup 0/F) to 288/sup 0/C (550/sup 0/F). The results indicate Incoloy 800 and RA330 are acceptable materials for long-term, high-temperature service (up to 579/sup 0/C (1075/sup 0/F)), and that 316 and 316L stainless may be acceptable subject to results of further study. The results of tests on carbon steel indicate that it is acceptable for low-temperature molten salt applications (up to 288/sup 0/C (550/sup 0/F)). None of the carbon steel alloys tested were found to be acceptable for intermediate-temperature service (up to 400/sup 0/C (750/sup 0/F)). There does not seem to be any direct effect of molten salt exposure on materials properties or internal characteristics. The effects are essentially superficial oxide growth.
- Research Organization:
- Martin Mareitta Denver Aerospace Denver, Colorado
- OSTI ID:
- 6990106
- Report Number(s):
- CONF-811013-
- Journal Information:
- Proc. - Electrochem. Soc.; (United States), Vol. 83-1; Conference: Electrochemical Society conference, Denver, CO, USA, 11 Oct 1981
- Country of Publication:
- United States
- Language:
- English
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INCOLOY 800
DYNAMICS
MATERIALS TESTING
MECHANICAL PROPERTIES
MOLTEN SALTS
CATALYTIC EFFECTS
POTASSIUM NITRATES
RADIUM ADDITIONS
SODIUM NITRATES
SOLAR RECEIVERS
SERVICE LIFE
STAINLESS STEEL-316
CHEMICAL REACTION KINETICS
STABILITY
ALKALI METAL COMPOUNDS
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCOLOY ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
KINETICS
MATERIALS
MECHANICS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
REACTION KINETICS
SALTS
SODIUM COMPOUNDS
STAINLESS STEELS
STEELS
TESTING
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