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Title: Corrosion behavior of SiC reinforced magnesium composites
Authors: Tiwari, S.
Balasubramaniam, R.
Gupta, M. 
Keywords: A. Composites, Magnesium, SiC reinforcement
B. Polarization, EIS, SEM, XRD
C. Galvanic corrosion, Interfaces, Passive film
Issue Date: Feb-2007
Citation: Tiwari, S., Balasubramaniam, R., Gupta, M. (2007-02). Corrosion behavior of SiC reinforced magnesium composites. Corrosion Science 49 (2) : 711-725. ScholarBank@NUS Repository.
Abstract: The corrosion behavior of two SiC reinforced Mg-based metal matrix composites, Mg-6SiC and Mg-16SiC (in volume percent), has been studied in freely aerated 1 M NaCl solution and compared with that of pure Mg. The presence of SiC particles deteriorated the corrosion resistance of magnesium. Corrosion resistance decreased with increasing SiC volume fraction. The galvanic corrosion current density between pure SiC and pure Mg has been experimentally measured using zero resistance ammeter technique and theoretically determined using mixed potential theory. Galvanic corrosion between Mg matrix and SiC reinforcement in the composites did not contribute significantly to the overall corrosion rate. Electrochemical impedance spectroscopy indicated that the higher corrosion rates for the composites could be related to the defective nature of surface film. © 2006 Elsevier Ltd. All rights reserved.
Source Title: Corrosion Science
ISSN: 0010938X
DOI: 10.1016/j.corsci.2006.05.047
Appears in Collections:Staff Publications

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