Abstract
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 (0.2mVs-1 within ~±30mV from the open circuit voltage). Hastelloy C-276 exhibited the lowest corrosion rates of ~10 and 40μm per year in 13.4NaCl-33.7KCl-52.9ZnCl2 (mol%) salt at 250 and 500°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-52.9ZnCl2 (mol%) at 500°C (corrosion rate ~50μm per year). Among the samples evaluated, Hastelloy N showed highest corrosion rate of 150μm per year at 500°C.
Original language | English (US) |
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Pages (from-to) | 62-69 |
Number of pages | 8 |
Journal | Solar Energy |
Volume | 103 |
DOIs | |
State | Published - May 2014 |
Keywords
- Corrosion rate
- Halide eutectic molten salts
- High temperature corrosion
- Potentiodynamic polarization
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- General Materials Science