| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Alloys, Processing and Characterization
|
| Presentation Title |
The Corrosion Behavior of 5xxx and 6xxx Aluminum Alloys with Trace Calcium |
| Author(s) |
Saugat M. Singh, Kumar Sundaram, B. Pesic |
| On-Site Speaker (Planned) |
Saugat M. Singh |
| Abstract Scope |
The aluminum alloys containing magnesium and silicon as main alloying elements have found to be recycle friendly. During the recycling process, calcium is found as a trace element or through deliberate addition. The addition of calcium may influence the corrosion properties of the alloy via changes like microstructure and compositional chemistry. This study investigates the potential effects of added calcium and fabrication process on the corrosion behavior of 5xxx and 6xxx alloys using standard corrosion evaluation techniques, like Tafel, linear and cyclic polarization. The results show addition of trace calcium does not show significant changes to corrosion behavior and repassivation behavior of the alloys. The breakdown potential of the alloys shown to decrease linearly with increase in the chloride concentration. The 5xxx alloy shows decrease in corrosion potential with increase in sensitization time. The mechanism for the observed corrosion behavior in presence of calcium and microstructural changes will be discussed. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Recycling and Secondary Recovery, Other |