About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Magnesium Technology 2023
|
Presentation Title |
E-25: Simulations of Microgalvanic Effects in Corrosion of Mg Alloys |
Author(s) |
Vishwas Goel, Yanjun Lyu, David Montiel, Katsuyo Thornton |
On-Site Speaker (Planned) |
Vishwas Goel |
Abstract Scope |
We employed a phase-field model implemented within the PRISMS-PF framework to investigate corrosion in Mg alloys. When the corrosion rate was limited by the cathodic reaction, an increase in cathodic-phase fraction led to a higher corrosion rate due to an increase in the cathodic-phase/electrolyte interfacial area. Additionally, we observed an acceleration in corrosion as the anodic phase corroded and exposed more of the cathodic phase to the electrolyte. The distribution of the corrosion current, as well as the morphology of the corroded surface, infer an existence of two length scales, one that is small and is associated with a larger corrosion current near the triple phase boundary, and the other on a larger scale, greater than the simulation domain size we examined. The study was conducted in two- and three-dimensions, both of which exhibited similar corrosion behavior. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnesium, Modeling and Simulation, Other |