| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2023
|
| Presentation Title |
Open-air Plasma Assisted Si-O-C Layer Deposition on AZ91D Mg Alloy for Corrosion Mitigation |
| Author(s) |
Jiheon Jun, Yong Chae Lim, Yi-Feng Su, Daphne Pappas, Andrew Sy, Ryan Robinson |
| On-Site Speaker (Planned) |
Jiheon Jun |
| Abstract Scope |
Use of Mg alloy structural parts can enable lightweight automobiles for improved energy efficiency. High corrosion susceptibility of Mg alloys, however, remains as a technical challenge against their application in vehicle-structures. This work investigated open-air plasma assisted Si-O-C coating as a corrosion barrier for AZ91D Mg alloy. The open-air plasma coating does not involve wet chemical process and is amenable to the industries experienced in other plasma-based processes. As-deposited coatings on AZ91D substrates were characterized by advanced microscopic characterization techniques, including SEM, STEM and EDS. Corrosion evaluation was performed using electrochemical impedance spectroscopy, polarization and H2 collection measurements in 3.5 wt.% NaCl solution. Post-immersion AZ91D samples, that were uncoated or Si-O-C coated condition, were also characterized by SEM, STEM and EDS. The results indicated that plasma-assisted Si-O-C coating delayed the initiation of corrosion and the progression of corrosion attack. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Environmental Effects, Process Technology |