| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Surface Engineering VII
|
| Presentation Title |
Controlling the spangle size and crystallographic texture of hot-dip galvanized coatings through substrate surface modification |
| Author(s) |
Eui-Jin Jung, Gu-Jin Chung, Joo-Youl Huh, Tae-Chul Kim |
| On-Site Speaker (Planned) |
Joo-Youl Huh |
| Abstract Scope |
Several challenges exist in hot-dip galvanized steel sheets, particularly in the automotive industry where spangle size must be reduced to below 100 µm to enhance anti-galling and gloss properties. Additionally, the strong (0001) basal texture of the zinc grains should be reduced to avoid coating delamination. This study investigates how different types of surface roughness of steel sheets affect the spangle size and (0001) basal texture of GI (Zn-0.2wt.% Al) coatings. Prior to the hot-dipping process, the steel sheets were subjected to indentation treatments to modify the surface roughness. Comprehensive EBSD analyses demonstrated that the spangle size and (0001) basal texture of GI coatings stronly depend on the size and density of indents. In the presentation, we will further discuss on the existance of a ciritcal size for the indents to act as nucleation sites for Zn grains. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, Solidification, Iron and Steel |