About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Cutting-Edge Characterization and Electrochemical Techniques for Unraveling Corrosion Phenomena
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| Presentation Title |
Understanding the Influence of Secondary Phase Particles on Localized Corrosion of Al A356 Alloy to Enable an Increased Use of Recycled Al |
| Author(s) |
Mohammad Umar Farooq Khan, Alphan Berkem, Jenifer Locke, Alan Luo |
| On-Site Speaker (Planned) |
Mohammad Umar Farooq Khan |
| Abstract Scope |
This study investigates how intermetallic particles influence localized corrosion in cast Al A356 both as a baseline alloy and with increased recycled Al content where the concentration of elements like Cu, Fe, and Ni are increased. To assess the role of intermetallic phases, micro-electrochemical polarization tests were performed on the alloy and several surrogate intermetallic phases containing Fe, Cu, and Ni in a 5 wt.% NaCl solution acidified to pH 3 to approximate corrosive road environments. The corrosion behavior of the modified recycled compositions and associated intermetallic phases was evaluated and compared with the baseline alloy. Lab-scale immersion tests were conducted on both cast A356 and modified alloy samples with pre- and post-corrosion characterization used to identify the intermetallic particles most likely to lead to decreased corrosion resistance. Together, electrochemical testing and detailed characterization provide a mechanistic understanding of the effect of intermetallic particles on localized corrosion. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Environmental Effects, Recycling and Secondary Recovery |