Thermal-convection-loop study of the corrosion of Fe-Ni-Cr alloys by molten NaNo/sub 3/-KNO/sub 3/
The corrosion of Fe-Ni-Cr alloys by draw salt (60 wt % NaNO/sub 3/-40 wt % KNO/sub 3/) is studied with thermal convection loops of alloy 800 and types 304L and 316 stainless steel. The main corrosion processes at 600/sup 0/C and below were the growth of thin oxide scales and the dissolution of chromium by the salt. Spallation of oxide layers occurred on type 304 stainless steel specimens at intermediate temperatures. Results indicated relatively low corrosion rates (< 13 ..mu..m/year in most cases) for temperatures of 600/sup 0/C and less. Corrosion of type 316 stainless steel was greatly accelerated when the maximum loop temperature was raised to 620/sup 0/C. It therefore appears that 600/sup 0/C may be the limiting temperature for use of the above alloys in draw salt.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6630235
- Report Number(s):
- ORNL/TM-8298; ON: DE83004228
- Country of Publication:
- United States
- Language:
- English
Similar Records
Corrosion of 316SS and IN800 in molten NaNO/sub 3/ - KNO/sub 3/
Oxidation and chromium depletion of Alloy 800 and 316SS by molten NaNO/sub 3/-KNO/sub 3/ at temperatures above 600/degree/C
Related Subjects
36 MATERIALS SCIENCE
INCOLOY 800
CORROSION
MOLTEN SALTS
CORROSIVE EFFECTS
POTASSIUM NITRATES
SODIUM NITRATES
STAINLESS STEEL-304
STAINLESS STEEL-316
ARGON
CARBON DIOXIDE
CHROMIUM
EXPERIMENTAL DATA
HIGH TEMPERATURE
IMPURITIES
IRON
MOLYBDENUM
NICKEL
NITROGEN
OXYGEN
SCALING
TEMPERATURE DISTRIBUTION
TIME DEPENDENCE
WATER
WEIGHT
ALKALI METAL COMPOUNDS
ALLOYS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
DATA
ELEMENTS
FLUIDS
GASES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HYDROGEN COMPOUNDS
INCOLOY ALLOYS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
METALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NITRATES
NITROGEN COMPOUNDS
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
RARE GASES
SALTS
SODIUM COMPOUNDS
STAINLESS STEELS
STEELS
TRANSITION ELEMENTS
142000* - Solar Energy- Heat Storage- (1980-)
141000 - Solar Collectors & Concentrators
360105 - Metals & Alloys- Corrosion & Erosion