| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability in Extreme Environments
|
| Presentation Title |
Corrosion Behavior of Co-Fe4Mn4Nb4Si2B14, Fe49Co49V2, and Fe82Cr18 Alloys in Venusian Environment |
| Author(s) |
Yuankang Wang, Alex Leary, Paul Ohodnicki |
| On-Site Speaker (Planned) |
Yuankang Wang |
| Abstract Scope |
The planetary exploration on Venus was hampered by its hostile surface environment (mostly of CO2 and N2 as well as traces of SO2, H2O, CO, OCS, HCl, HF, and H2S), high temperature and high pressure. For successful exploration on Venus, it is critical to understand corrosion behavior of materials in Venusian environment. This project investigated three candidate magnetic materials used in fabricating inductors and transformers, Fe82Cr18, Fe49Co49V2, and Co-Fe4Mn4Nb4Si2B14, exposed to Venusian atmosphere. The materials after exposure were characterized by XRD, SEM, EDS and TEM. The results indicates that Co-rich sulfides and Fe-rich sulfites are main corrosion products of materials with high Co and Fe content, respectively. Fe82Cr18 exhibits best corrosion resistance because of the formation of continuous protective Cr-rich scale on the surface during initial stage of corrosion. This protective scale prevents further corrosion by impeding the outward diffusion of metallic elements and inward diffusion of corrosive gas molecules. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Copper / Nickel / Cobalt, Environmental Effects, Iron and Steel |