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Corrosion Resistance of SiCp/Al Metal Matrix Nanocomposites

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Abstract:

The effect of volume fraction of SiC nanoparticles on the corrosion resistance of the SiCp/Al metal matrix composites (MMCs) in 3.5 wt.% NaCl aqueous solution were investigated by potentiodynamic polarization and electrochemical impedance spectroscopy. The results show that pitting susceptibility is about the same for the nanocomposites and the correspondingly unreinforced matrix metal Al, and the corrosion potentials of the MMCs are about 50 mV-60 mV more positive than that of the unreinforced Al, and is independent of the volume fraction of SiC nanoparticles. The corrosion resistance for the nanocomposite slightly decreases when the volume fraction increases due to both SiC nanoparticle agglomeration and promoting galvanic corrosion between SiC and Al.

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Periodical:

Advanced Materials Research (Volume 773)

Pages:

468-471

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.773.468

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Online since:

September 2013

Authors:

Chun Lin He, Ying Ying Bai, De Yuan Lou, Guo Feng Ma, Jan Ming Wang, Zhao Fu Du, Dong Liang Zhao

Keywords:

Aluminum (Al), Corrosion Resistance, Nanocomposite, SiC Nanoparticle

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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