Phase stability of dross particles in hot-dip Zn-55wt%Al-1.6wt%Si galvanizing bath
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Date
2023-01-31
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Abstract
Dross in a Zn-55wt%Al-1.6wt%Si metal coating bath is a mixture of bath metal and the quaternary intermetallic phase τ5c-Al20Fe5Si2(+Zn). Understanding the properties and formation of dross in a hot-dip Al-Zn galvanizing bath at the processing temperature (~600 °C) is critical for improving the production quality of steel sheet coating. However, dross analysis is usually conducted at room temperature with dross samples taken from the hot-dip bath and it is not known how representative these samples are of the phase(s) existing at high temperature. Using in-situ synchrotron X-ray diffraction (XRD), the crystal lattice and the coefficient of thermal expansion (CTE) of the intermetallic phase have been determined in the temperature range of 30 °C to 660 °C. Phase formation and phase stability of the intermetallic phase in the dross powder have been determined, providing fundamental knowledge for optimizing the production and quality of steel sheet coating.
© 2023 The Authors.
Description
Keywords
Phase stability, X-ray diffraction, Crystal lattices, Surface coating, Powders, Mechanical properties
Citation
Qu, D., Gear, M., Gu, Q., Setargew, N., Renshaw, W., McDonald, S., StJohn, D., & Nogita, K. (2023). Phase stability of dross particles in hot-dip Zn-55wt%Al-1.6wt%Si galvanizing bath. Materials, 16(3), 1211. doi:10.3390/ma16031211