|About this Abstract
|2020 TMS Annual Meeting & Exhibition
|Coatings and Surface Engineering for Environmental Protection II
|Electrochemical Impedance Spectroscopic Study of Oxide Scales on Pure Iron in Liquid Lead-bismuth Eutectic
|Jie Qiu, Peter Hosemann, Digby Macdonald, John Scully
|On-Site Speaker (Planned)
The impedance behavior of pre-oxidized pure iron in liquid lead-bismuth eutectic (LBE) was studied using electrochemical impedance spectroscopy. The resistance of the oxide scale on the iron oxidized in air at different temperatures and for different durations are studied. Results show that the impedance of the oxide film increases with increasing the oxidation temperature. The impedance of the samples oxide at 200 oC and 400 oC were negligible, indicating the oxide film formed at low temperature was too thin to prevent LBE penetrate into the oxide scale. At temperatures above 600 oC, a compact “p-type” Wüstite oxide scale is formed on iron while the resistance of the oxide film increases with increasing temperature, due to the formation of a thicker scale. At the same temperature, prolonging the oxidation time in air can reduce the defect concentration in the oxide film and improve the oxide scale corrosion resistance in LBE.
|Planned: Supplemental Proceedings volume