| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Multiple Principal Component Materials
|
| Presentation Title |
How Alloying Elements Affect Passivation and Dissolution in the NiCrFeCoMn System: New Insights Using Element-resolved Electrochemistry |
| Author(s) |
Kevin Ogle, Chenyang Xie, Fan Sun, Junsoo Han |
| On-Site Speaker (Planned) |
Kevin Ogle |
| Abstract Scope |
Understanding how different MPEA alloying elements react and interact during passivation and corrosion is essential for navigating the multidimensional composition space required for MPEA development. How do the electrochemical properties of the individual elements contribute to the overall kinetics of alloy dissolution and passive film formation and ultimately determine the corrosion resistance of the alloy? In this presentation, we will review recent efforts to address these questions using element resolved electrochemical methods (atomic spectroelectrochemistry). This method directly measures the elemental dissolution rates during electrochemical experiments and and elemental incorporation into the passive film may be determined indirectly by mass balance. To illustrate the methodology, we will focus on the formation of the Cr enriched passive film of the NiCrFeCoMn system in acid solution, the negative effect of Mn, with an emphasis on spontaneous (open circuit) passivation from either the active or the transpassive state. |
| Proceedings Inclusion? |
Planned: |