|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Applications of Process Engineering Principles in Materials Processing, Energy and Environmental Technologies: An EPD Symposium in Honor of Professor Ramana G. Reddy
||Corrosion Mechanism of Haynes 230 with Ni Crucible in MgCl2-KCl
||Yuxiang Peng, Ramana G. Reddy
|On-Site Speaker (Planned)
The long-term corrosion behavior of Haynes 230 alloy in KCl-MgCl2 salt at 1000oC was evaluated in current study. The test was performed at 1000oC for 500 hours in Ni crucible under an argon cover gas. In this test, Haynes 230 alloy shows good corrosion resistance. In addition, corrosion was noted to occur by depletion of Cr. And the Cr deposition on the Ni crucible proves that corrosion mechanism may be galvanic corrosion. Thus, Gibbs energy of Ni-Cr alloy is studied based on the thermodynamic calculation. And thermodynamic modeling studies are performed with Nernst equation to understand the potential of cathode and anode at 1000oC. To compare with experimental data, tafel prediction is studied based on the known exchange current density and tafel slope.
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