Effect of Oxide Scale on Hot Dip Zn-Al-Mg Alloy Coating Prepared by Reduction Combined with Induction Heating

Yijie Zhang; Minyun Xu; Ruina Ma; An Du; Yongzhe Fan; Xue Zhao; Xiaoming Cao

doi:10.3390/met10111519

Metals (Nov 2020)

Effect of Oxide Scale on Hot Dip Zn-Al-Mg Alloy Coating Prepared by Reduction Combined with Induction Heating

Yijie Zhang,
Minyun Xu,
Ruina Ma,
An Du,
Yongzhe Fan,
Xue Zhao,
Xiaoming Cao

Affiliations

Yijie Zhang: School of Materials Science and Engineering, Hebei University of Technology, Key Lab for New Type of Functional Materials in Hebei Province, Tianjin Key Lab Material Laminating Fabrication and Interface, Tianjin 300132, China
Minyun Xu: School of Materials Science and Engineering, Hebei University of Technology, Key Lab for New Type of Functional Materials in Hebei Province, Tianjin Key Lab Material Laminating Fabrication and Interface, Tianjin 300132, China
Ruina Ma: School of Materials Science and Engineering, Hebei University of Technology, Key Lab for New Type of Functional Materials in Hebei Province, Tianjin Key Lab Material Laminating Fabrication and Interface, Tianjin 300132, China
An Du: School of Materials Science and Engineering, Hebei University of Technology, Key Lab for New Type of Functional Materials in Hebei Province, Tianjin Key Lab Material Laminating Fabrication and Interface, Tianjin 300132, China
Yongzhe Fan: School of Materials Science and Engineering, Hebei University of Technology, Key Lab for New Type of Functional Materials in Hebei Province, Tianjin Key Lab Material Laminating Fabrication and Interface, Tianjin 300132, China
Xue Zhao: School of Materials Science and Engineering, Hebei University of Technology, Key Lab for New Type of Functional Materials in Hebei Province, Tianjin Key Lab Material Laminating Fabrication and Interface, Tianjin 300132, China
Xiaoming Cao: School of Materials Science and Engineering, Hebei University of Technology, Key Lab for New Type of Functional Materials in Hebei Province, Tianjin Key Lab Material Laminating Fabrication and Interface, Tianjin 300132, China

DOI: https://doi.org/10.3390/met10111519
Journal volume & issue: Vol. 10, no. 11
p. 1519

Abstract

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Hot dipping Zn-Al-Mg coatings were prepared by rapid induction heating combined with gas protection. The influence of oxide scale on the structure and surface quality of a hot-dip Zn-6Al-3Mg alloy coating was studied in this paper. The results showed that the reaction of Fe-Al was suppressed by the scale on the surface of the steel plate. When the thickness of scale was 10 μm and the steel entry temperature was 900 °C, the surface quality of the coating was good. The Zn-Al-Mg coatings mainly consisted of the ternary eutectic structure of Zn/Al/MgZn2 and Fe4Al13 at the interface. When the scale thickness was 2–3 μm with the same steel entry temperature, the surface quality of the coating was poor, and serious stripe-like protrusion defects were formed on the surface of the coating, which was mainly caused by the Fe4Al13 phase separating from the substrate / coating interface into the overlay.

Published in Metals

ISSN: 2075-4701 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Mining engineering. Metallurgy
Website: http://www.mdpi.com/journal/metals

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