Journal
SOLAR ENERGY
Volume 103, Issue -, Pages 62-69Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2014.02.002
Keywords
Halide eutectic molten salts; High temperature corrosion; Potentiodynamic polarization; Corrosion rate
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Funding
- DOE MURI [DE-EE0005942]
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Corrosion rates have been estimated for commercial Hastelloys C-276, C-22 and N types in eutectic molten salts containing NaCl, KCl and ZnCl2 using steady-state potentiodynamic method (0.2 mV s(-1) within similar to +/- 30 mV from the open circuit voltage). Hastelloy C-276 exhibited the lowest corrosion rates of similar to 10 and 40 mu m per year in 13.4NaCl-33.7KCl-52.9ZnCl(2) (mol%) salt at 250 and 500 degrees C, respectively. The potentiodynamic method was validated by conducting traditional immersion test for corrosion rate estimation on C-276 Hastelloy in 13.4NaCl-33.7KCl-52.9ZnCl(2) (mol%) at 500 degrees C (corrosion rate similar to 50 mu m per year). Among the samples evaluated, Hastelloy N showed highest corrosion rate of >150 mu m per year at 500 degrees C. (C) 2014 Elsevier Ltd. All rights reserved.
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