| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
O-35: Bainite Formation during Zinc Galvanizing on Steel |
| Author(s) |
Bong-Kyu Kim, Jun Hyun Han |
| On-Site Speaker (Planned) |
Bong-Kyu Kim |
| Abstract Scope |
Hot-dip galvanizing is known as a surface treatment to prevent steel corrosion by forming Zinc plating layers on the steel surface. However, because Zinc is melted, there are problems with thickness, low plating adhesion, and poor uniformity. Small amount of Al is added to improve plating adhesion and uniformity. Mg is added to improve corrosion resistance. The addition of Mg facilitates the formation of the corrosion-producing Simonkolleite on plated layer of Zn-Mg-Al and has high corrosion resistance of 5-10 times than existing Hot-dip galvanizing. The temperature of the Zn-Mg-Al alloy plating bath is between 440°C and 460°C, which is known to be similar to that of Bainite formation during heat treatment of steels. Therefore, in this study, zinc plating was performed at the formation temperature of Bainite to achieve both the improvement of corrosion resistance by galvanizing and the enhancement of strength and ductility due to the formation of Bainite. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |