Effect of Heat Treatment on Microstructures and Properties of Zinc-Aluminum Coating on AZ91D Magnesium Alloy

Abstract:

A protective zinc-aluminum spray coating and a post heat treatment was carried out onto AZ91D magnesium alloy. The effect of post heat treatment on the interfacial characteristics, corrosion behaviors, micro-hardness, and thermal shock resistance of the zinc-aluminum coating were evaluated in this paper. It was found that a dense inter-coating formed at the Zn/Mg substrate interface followed by the post heat treatment. The results of EDS analysis indicated that the diffusion took place among Mg, Al and Zn atoms. The Zn-Al deposited coating with heat treatment had much more corrosion resistant and higher resistant to thermal shock. It was harder than as-received AZ91D Mg alloy.

• Periodical: Key Engineering Materials (Volumes 373-374)
• Pages: 55-58
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.373-374.55
• Online since: March 2008
• Authors: Jin Zhang, Ying Wang
• Keywords: Corrosion Resistance, Magnesium Alloy, Thermal Spray, Zinc-Alluminium Coating

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