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Effect of laser surface melting on corrosion behaviour of AZ91D Mg alloy in simulated-modified body fluid

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Abstract

High corrosion rate in physiological environment of the body is the major drawback of magnesium alloys for their successful applications as biodegradable orthopaedic implants. In the present study, corrosion behaviour of AZ91D magnesium alloy after laser surface melting (LSM) was studied in modified-simulated body fluid at 37 °C. The improved corrosion resistance of AZ91D alloy using LSM was found to depend on the solidification microstructure in the laser-melted zone. The general and pitting corrosion resistance of laser-treated surface was significantly enhanced due to the refined continuous network of β-Mg17Al12 phases and the increased Al concentration in the laser-melted zone.

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Authors and Affiliations

  1. Precision Engineering and Nanotechnology Centre, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore

    Y. C. Guan & Wei Zhou

  2. Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore, 638075, Singapore

    Wei Zhou & H. Y. Zheng

Authors
  1. Y. C. Guan
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  2. Wei Zhou
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  3. H. Y. Zheng
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Correspondence to Wei Zhou.

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Guan, Y.C., Zhou, W. & Zheng, H.Y. Effect of laser surface melting on corrosion behaviour of AZ91D Mg alloy in simulated-modified body fluid. J Appl Electrochem 39, 1457–1464 (2009). https://doi.org/10.1007/s10800-009-9825-2

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  • DOI: https://doi.org/10.1007/s10800-009-9825-2

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