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| INFLUENCE OF ADDITIVE ON PREPARATION OF BLACK CERAMIC COATING ON ALUMINUM ALLOY BY MICRO-ARC OXIDATION METHOD |
| LONG Yingchun, LI Wenfang, ZHANG Guoge, YU Fei |
| School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640 |
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Abstract Black ceramic coating was obtained by micro-arc oxidation on 6063 aluminum alloy in an electrolyte containing silicate-phosphate. SEM, EDS, XRD, spectrophotometer, 3D morphology instrument were used to characterize the morphology, composition, microstructure, blackness, surface roughness and corrosion resistance of the ceramic coating. The results showed that the additive not only improved the blackness, homogeneity and adhesion strength of ceramic coating, but also reduced the surface roughness. The constituent phase in coatings from electrolyte with or without additive were the same, i.e. γ-Al2O3 and Al$_{86}V14. The corrosion current density of coating treated in electrolyte containing additive was much lower than that of the coating fabricated without additive, indicating significantly improved corrosion resistance.
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Received: 13 September 2011
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Corresponding Authors:
LI Wenfang
E-mail: mewfli@scut.edu.cn
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Cite this article:
LONG Yingchun, LI Wenfang, ZHANG Guoge, YU Fei. INFLUENCE OF ADDITIVE ON PREPARATION OF BLACK CERAMIC COATING ON ALUMINUM ALLOY BY MICRO-ARC OXIDATION METHOD. Journal of Chinese Society for Corrosion and protection, 2012, 32(5): 388-392.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2012/V32/I5/388
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