| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Surface Engineering VII
|
| Presentation Title |
Enhancing Corrosion Resistance in Multimaterial Joints for Automotive Lightweighting Applications |
| Author(s) |
Sridhar Niverty, Rajib Kalsar, Yucheng Fu, Yucheng Fu, Vilayanur V Viswanathan, Benjamin J. Schuessler, Vineet V. Joshi |
| On-Site Speaker (Planned) |
Sridhar Niverty |
| Abstract Scope |
The adoption of light metal alloys in automotive design introduces new challenges related to corrosion due to their distinctive electrochemical behaviors and the prevalence of multimaterial joints, which can cause localized galvanic and crevice corrosion. In this study, we used COMSOL Multiphysics simulations and mathematical modeling to analyze the impact of geometric factors and surface modifications (plasma treatment and adhesives) on galvanic corrosion in multimaterial joints fabricated through High Velocity Riveting (HiVe). Guided by modeling insights, we conducted corrosion experiments for durations up to 1400 hours under salt fog (ASTM B117). Our combined modeling and experiments highlight the critical role of area ratio and surface treatment in corrosion initiation and progression. Gravimetric analysis, electron microscopy, and x-ray tomography show that surface treatments effectively reduce corrosion susceptibility. Notably, our findings indicate that rivet-less HiVe joining is the most effective strategy to mitigate corrosion in multimaterial joints. |
| Proceedings Inclusion? |
Planned: |