Corrosion of stainless and carbon steels in molten mixtures of industrial nitrates
- Sandia National Labs., Livermore, CA (United States)
- Sandia National Labs., Albuquerque, NM (United States)
Corrosion behavior of two stainless steels and carbon steel in mixtures of NaNO{sub 3} and KNO{sub 3} was evaluated to determine if impurities found in commodity grades of alkali nitrates aggravate corrosivity as applicable to an advanced solar thermal energy system. Corrosion tests were conducted for 7000 hours with Types 304 and 316 stainless steels at 570C and A36 carbon steel at 316C in seven mixtures of NaNO{sub 3} and KNO{sub 3} containing variations in impurity concentrations. Corrosion tests were also conducted in a ternary mixture of NaNO{sub 3}, KNO{sub 3}, and Ca(NO{sub 3}){sub 2}. Corrosion rates were determined by descaled weight losses while oxidation products were examined by scanning electron microscopy, electron microprobe analysis, and X-ray diffraction. The nitrate mixtures were periodically analyzed for changes in impurity concentrations and for soluble corrosion products.
- Research Organization:
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 10141843
- Report Number(s):
- SAND-94-8211; ON: DE94009866; BR: GB0103012
- Resource Relation:
- Other Information: PBD: Mar 1994
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
STAINLESS STEEL-304
CORROSION
STAINLESS STEEL-316
CARBON STEELS
POTASSIUM NITRATES
CORROSIVE EFFECTS
SODIUM NITRATES
MOLTEN SALTS
IMPURITIES
SOLAR THERMAL POWER PLANTS
CENTRAL RECEIVERS
DEMONSTRATION PLANTS
CSP
Concentrating Solar Power
360105
140702
CORROSION AND EROSION
CENTRAL RECEIVER