About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Surface Engineering IX
|
| Presentation Title |
Bridging Laboratory Testing and Field Performance: A Correlation Strategy for Predicting Long-Term Corrosion Behavior |
| Author(s) |
Sridhar Niverty, Alasdair Crawford, Vineet V Joshi |
| On-Site Speaker (Planned) |
Sridhar Niverty |
| Abstract Scope |
Automotive materials and their coatings must withstand harsh, corrosive environments while maintaining performance over time. While standardized tests exist for assessing material performance, bridging the gap between accelerated laboratory testing and real-world conditions remains challenging. This study integrates potentiostatic polarization testing with ASTM B117 salt spray testing to address this issue. We evaluate commercial electrocoat and top-coated, AZ91 Mg alloy and Zn cold spray-coated AZ91, to compare their protective efficacy under long term exposure to a corrosive environment. 2D and 3D microstructural characterization methods were used to assess corrosion extent for both test methods and establish correlations between applied potential and exposure duration. To rationalize the experimental findings, COMSOL Multiphysics modeling was used to investigate the interplay between applied potential, exposure time, surface activation, and electrolyte concentration in coated and uncoated systems, offering deeper insights into corrosion mechanisms, role of corrosion products and long-term material performance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Computational Materials Science & Engineering, Surface Modification and Coatings |