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Corrosion Behavior of the Composite Coatings Prepared on Magnesium Alloy AZ91 in Na2SO4 Solution

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Abstract:

The composite coatings were obtained on a magnesium alloy by micro-arc oxidation (MAO) and sol-gel technique. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion behavior of MAO coating and composite coatings in a 3.5% Na2SO4 solution. The results show that corrosion behavior of the MAO coating and composite coatings are different at different immersion times. The corrosion resistance of composite coatings is good than that of MAO coating.

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Periodical:

Advanced Materials Research (Volume 900)

Pages:

522-525

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.900.522

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Online since:

February 2014

Authors:

Wei Shang, Zhou Lan Yin*, Yu Qing Wen, Xu Feng Wang

Keywords:

Composite Coating, Corrosion Behavior, Magnesium Alloy, Na2SO4 solution

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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