| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Materials
|
| Presentation Title |
Additive Manufacturing Technique to Achieve a Chemically Homogeneous Zinc/AA5456 Mixture to Arrest Corrosion Propagation |
| Author(s) |
Minh Hong Tran, Fanyue Kong, Elena Romanovskaia, Valentin Romanovski, James Burns, Ji Ma, John Scully |
| On-Site Speaker (Planned) |
Minh Hong Tran |
| Abstract Scope |
Aluminum alloy AA5456, commonly utilized in marine environments, is prone to intergranular corrosion due to the anodic behavior of β-phase precipitates compared to the aluminum matrix. To enhance the corrosion resistance of AA5456, additive manufacturing of a sacrificial material on the surface was tested to interrupt corrosion progression. Laser Powder Bed Fusion (LPBF) enables cathodic protection by modifying the surface electrochemical potential of AA5456. High-purity Zn surface patterns were fabricated on AA5456, significantly reducing corrosion propagation and improving barrier properties compared to untreated specimens by sacrificial cathodic protection. During LPBF, the heterogeneous mixing of the two materials can increase potential driving forces within the sacrificial anodes. By incorporating a remelting process, enhanced Zn-Al mixing results in a more homogeneous composition in the anode melt-pools, minimizing the risk of large micro-galvanic potentials within the anodes caused by Zinc-rich areas. Electrochemical methods confirmed the effectiveness of the remelted sacrificial anodes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Environmental Effects, Aluminum |