About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advanced Materials for Harsh Environments
|
| Presentation Title |
Understanding the influence of impurity elements on the localized corrosion in recycled cast Al A356 alloy |
| Author(s) |
Mohammad Umar Farooq Khan, Alphan Berkem, Alan Luo, Jenifer W Locke |
| On-Site Speaker (Planned) |
Mohammad Umar Farooq Khan |
| Abstract Scope |
In this work the influence of secondary phase intermetallic particles on the resulting localized corrosion behavior of recycled cast Al A356 alloy is studied. To understand and quantify the role of intermetallic particles containing impurity elements such as, Fe, Cu, or Ni, on localized corrosion, electrochemical potentiodynamic polarization testing is being conducted on the alloy and surrogate secondary phases using the micro-electrochemical technique in an acidified chloride environment of 5 wt.% NaCl acidified to pH-3 with glacial acetic acid. Additionally, salt spray testing in ASTM G85-A2 will be conducted on cast wheel and pre and post-corrosion surface characterization will be used to identify any deleterious intermetallic particles or morphological/compositional changes on or around them. Both electrochemical and characterization results will be utilized to unravel the mechanistic understanding for the role of intermetallic particles on localized corrosion and inform on alloy development to increase the recycled alloy content in future products. |