| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Advanced Coatings for Wear and Corrosion Protection
|
| Presentation Title |
Galvanic Corrosion Mitigation of CFRP-AZ31B Dissimilar Joint |
| Author(s) |
Yong Chae Lim, Jiheon Jun, Jong Kahk Keum, Yuan Li, Donovan Leonard, Michael Brady, Zhili Feng |
| On-Site Speaker (Planned) |
Yong Chae Lim |
| Abstract Scope |
Advanced high specific strength materials such as magnesium alloys and carbon fiber reinforced polymer (CFRP) can be employed to increase fuel efficiency for lightweight vehicles. However, joining and corrosion (especially galvanic corrosion) of such multi-materials joints are steep technical hindrances for transportation applications. In this work, we employed a friction self-piercing rivet process to spot join a CFRP to magnesium alloy AZ31B at a laboratory coupon scale. Different surface coatings/modifications were applied to the different rivet materials to mitigate galvanic effects at the rivet/multi-material interfaces. Corrosion behavior of CFRP-AZ31B joints was evaluated by 0.1 M NaCl immersion testing with increasing times. Post corroded joints were evaluated by corrosion depth assessment, optical and electron microscopy analysis. Surface coatings including oxide layer and PTFE polymer coating on the rivet material showed reduction of galvanic corrosion of the AZ31B compared to the untreated rivet case. |