About this Abstract |
| Meeting |
TMS Specialty Congress 2026
|
| Symposium
|
Energy Materials 2026
|
| Presentation Title |
Electrochemical Investigations of Hot Corrosion |
| Author(s) |
Youyuan Zhang, Shanshan Hu, Harry Finklea, Xingbo Liu |
| On-Site Speaker (Planned) |
Xingbo Liu |
| Abstract Scope |
Type-II hot corrosion poses a significant threat to high-temperature components in coal-fired power plants. This study investigates the electrochemical kinetics of TP347H stainless steel in synthetic coal ash containing molten sulfate salts (500C–900C). To overcome the lack of reliable high-temperature sensors, a robust, quartz-sealed Cu/Cu2+ reference electrode was developed. This electrode utilizes thermally activated sodium ion diffusion to achieve a low ohmic resistance of 6.7kohm at 500C, ensuring stability and reproducibility in aggressive melts. In-situ electrochemical noise (EN) analysis, alongside potentiodynamic polarization, revealed a complex temperature-dependent corrosion rate (650C<750C<700C). The rate reduction at 750C is attributed to iron sulfate decomposition and protective oxide layer formation. Advanced analysis using Hilbert-Huang Transform (HHT) and shot noise theory successfully differentiated corrosion mechanisms, identifying critical pit initiation and growth parameters. This research demonstrates the efficacy of in-situ electrochemical monitoring for understanding non-steady-state hot corrosion processes. |
| Proceedings Inclusion? |
Undecided |