About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmental Degradation of Multiple Principal Component Materials
|
Presentation Title |
Hot Corrosion of TP347H in Coal Ash – an Electrochemical Noise Investigation |
Author(s) |
Shanshan Hu, Xingbo Liu |
On-Site Speaker (Planned) |
Shanshan Hu |
Abstract Scope |
Electrochemical noise is adopted to study the corrosion behavior of TP347H at 650 oC – 750 oC in coal ash. The corrosion process is divided into five steps indicated by different characteristic potential noise patterns: direct oxidation, dissolution of protective scale, oxidation, sulfidation and continuous sulfidation. The corrosion product is divided into two layers: an external layer composed of Cr2O3 and Cr3S4 and an inner layer consisting of Fe2O3 and Fe3S4. The corrosion rate shows a maximum value at 700 oC. A further increase of temperature to 750 oC lowers the corrosion rate due to the decomposition of Fe2(SO4)3 to Fe2O3. |
Proceedings Inclusion? |
Planned: |