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| Experiments Investigation on Microstructure of Galvanized Zn-Al-Mg Coated Steel Sheet |
| L Jia-shun1,2,LI Feng1,YANG Hong-gang1,KANG Yong-lin2 |
1. Technology Center, Angang Steel Company Limited, Anshan 114009, Liaoning, China
2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract The facts of galvanizing parameters on microstructure of hot-dipped Zn-Al-Mg coated steel sheet were investigated. The surface and cross sectional microstructure of Zn-Al-Mg coating and the chemical composition and the morphology of alloy layer were analyzed by SEM and EDX. The element distribution in the depth direction of coating was analyzed by GDS. The element distribution in coating was analyzed by EPMA. The phase composition of coating were analyzed by XRD. The elements’ content in coating was explored by XPS. It is proved that the distributions of elements are asymmetry in the depth direction in coating, and zinc and magnesium is enriched in coating surface. Coating structure takes on multiphase commix, MgZn2 and pure zinc binary eutectic are the main phase and at the same time there are some zinc-rich nubby phase and a filmy alloy layer.
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Received: 21 August 2012
Published: 18 June 2013
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2013, Vol. 48 
