The Effect of Composition and Microstructure on Corrosion Behavior in SST of Zn-Al-Mg Galvanized Steel Sheet

Abstract:

Z11A3M, Z6A3M, Z1.6A1.6M, Z1A1M and Z1M coating samples were prepared in HDPS by traditional continuous hot dipping method. The microstructure, element distribution and phase was analyzed by SEM, EPMA and XRD. The corrosion resistance was checked in SST. The result was, MgZn₂ and eutectic could be found in all ZAM coating. The ZAM coatings showed excellent corrosion resistance in SST than GI. The corrosion resistance was 4.1 to 11 times of GI. There was no strong relativity between alloy composition and corrosion resistance due to Mg enrichment on the surface of coating. Edge-unsealed ZAM samples showed good corrosion resistance than edge-sealed sample.

• Periodical: Applied Mechanics and Materials (Volume 442)
• Pages: 64-69
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.442.64
• Online since: October 2013
• Authors: Feng Li*, Jia Shun Lv, Hong Gang Yang, Fang Zhou, Leng Zhang, Hong Ke Wang
• Keywords: Corrosion Behavior, Galvanized Steel Sheet, Microstructure, Zn-Al-Mg

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