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Effects of Mg17Al12 Precipitate on Corrosion Resistance of Al Ion Implanted AZ31 Magnesium Alloys
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Effects of Mg17Al12 Precipitate on Corrosion Resistance of Al Ion Implanted AZ31 Magnesium Alloys

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Abstract:

Al ion implantation of AZ31 magnesium alloy is carried out with an ion implantation dose of 1×1017 ions/cm2 at room temperature and at elevated temperature of about 200°C. ß-Mg17Al12 precipitate is observed on the ion implanted sample at elevated temperature by X-ray diffraction (XRD). Potentiodynamic polarization curves indicated that the corrosion potential and pitting corrosion breakdown potential for the samples implanted at elevated temperature are 330 and 480 mV higher than those of the unimplanted sample, respectively. The ß-phase precipitate is beneficial to the improvement in corrosion resistance of magnesium alloy. In addition, Al enrichment on the implanted surface also contributes to the improved corrosion resistance.

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Periodical:

Applied Mechanics and Materials (Volume 525)

Pages:

7-10

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.525.7

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Online since:

February 2014

Authors:

Peng Li*, W.M. Liu, M.Q. Wang

Keywords:

Corrosion Resistance, Ion Implantation, Magnesium Alloy, β-Mg17Al12 Precipitate

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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