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Article: Improvement of the properties of AZ91D magnesium alloy by treatment with a molten [AlCl.sub.3]-NaCl salt to form an Mg-Al intermetallic surface layer.
- Article from:
- JCT Research
- Article date:
- September 1, 2009
- Author:
CopyrightCOPYRIGHT 2009 Federation of Societies for Coatings Technology. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Abstract A process for surface modification of AZ91D magnesium alloy has been carried out in [AICI.sub.3]-NaCl molten salts melt at 573 K for 7 h. The process was used to form a diffusion alloying layer on the surface of the sample to improve corrosion resistance. The diffusion alloying layer was mainly composed of Mg-Al intermetallic compounds. The continued immersion test in 5% NaCl solutions displayed that molten salt diffusion-treated specimen had better corrosion resistance compared to the untreated AZ91D specimen. The polarization lest indicated that the Mg-Al intermetallic compounds of the layer were an effective corrosion barrier to decrease the corrosion rate for ...
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