Mechanical and Electrochemical Properties of Plasma Electrolytic Oxide Coatings on Magnesium Alloys

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Ceramic coatings were synthesized on pure magnesium, binary Mg-Al and Mg-Zn alloys by plasma electrolytic oxidation (PEO) technique, and their mechanical and electrochemical properties were investigated. The coatings showed porous microstructure and some volcano top-like pores on the surface. The coatings on Mg-Al alloys consisted of MgO, MgAl2O4 and Al2O3. In the coatings on Mg-Zn alloys, MgO and ZnO were detected. The hardness and wear resistance showed slight dependence on Al content but no tendency to increase with increasing Zn content. The coated Mg alloys with Al, Zn showed better corrosion resistance in 3.5%NaCl solution but poor corrosion resistance in methyl alcohol, compared to the coated pure Mg.

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Periodical:

Materials Science Forum (Volumes 539-543)

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Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran

Pages:

1224-1229

Citation:

S. Y. Chang et al., "Mechanical and Electrochemical Properties of Plasma Electrolytic Oxide Coatings on Magnesium Alloys", Materials Science Forum, Vols. 539-543, pp. 1224-1229, 2007

Online since:

March 2007

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$38.00

[1] E.F. Emley: Principles of Magnesium Technology (Pergamon Press, London 1966).

[2] R. Gadow, D. Scherer, Composite coatings with dry lubrication ability on light meral substrates, Surf. Coat. Technol. Vol. 151-152 (2002), p.471.

DOI: https://doi.org/10.1016/s0257-8972(01)01636-x

[3] A.L. Yeroklin, X. Nie, A. Leyland, A. Matthews, S.J. Dowey: Surf. Coat. Tech. Vol. 122 (1999), p.73.

[4] X. Nie, E.I. Meletis, J.C. Jiang, A. Leyland, A.L. Yeroklin, A. Matthews: Surf. Coat. Technol. Vol. 149 (2002), p.245.

[5] A.A. Voevodin, A.L. Yeroklin, V.V. Lyubimov, M.S. Donley, J.S. Zabinski: Surf. Coat. Technol. Vol. 86-87 (1996), p.516.

[6] J. Liang, B. Guo, J. Tian, H. Liu, J. Zhou, T. Xu: Applied Surface Sci. Vol. 252 (2005), p.345.

[7] J.A. Curran, T.W. Clyne: Surf. Coat. Tech. Vol. 199 (2005), p.177.

[8] O. Khaselev, D. Weiss, J. Yahalom: J. Electrochem. Soc. Vol. 146 (1999), p.1757.

[9] N.E. Popova, S.S. Popova, E.G. Povolotskii: Proceedings of All Russian conf. (SGTU, Saratov 1999), p.68.

[10] Japan Inst. of Magnesium: Handbook of Advanced Magnesium Technology (Kallos Publishing Co., Tokyo 2000).

[11] E. Ghali: Uhlig's Corrosion Handbook, 2 nd Ed. (John Wiley and Sons, Inc., 2000).

[12] B.G. Yu, Y.L. Kim, K.S. Lee and S.Y. Chang: Proceedings of the 1st Asian Symposium on Magnesium Alloys, (Oct., 2005), p.321.