Journal
MATERIALS LETTERS
Volume 59, Issue 14-15, Pages 1727-1731Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2005.01.050
Keywords
composite materials; microarc oxidation; coatings; corrosion resistance
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A ceramic coating was synthesized on the surface of SiCw/AZ91 magnesium matrix composite by means of microarc oxidation (MAO) technique. Scanning electron microscope (SEM) was employed to characterize the surface morphology and cross-section microstructure of the coating. The phase structure and the chemical composition of the ceramic coating were analyzed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The corrosion resistance of the coating was evaluated by immersion test and electrochemical method. The results showed that the corrosion rate of the coated SiCw/AZ91 composite was decreased greatly compared with that of the bare composite because of the protective microarc oxidation coating. (c) 2005 Elsevier B.V. All rights reserved.
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