Microstructure and Corrosion Resistance of Black Microarc Oxidation Ceramic Coatings on Magnesium Alloy

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Black micro-arc oxidation (MAO) ceramic coatings were prepared on magnesium alloy in a silicate electrolyte; SEM, EDS and XRD were tested to analyze surface morphology, chemical composition and phase composition of ceramic coatings, Corrosion resistant in 3.5% NaCl aqueous solution of magnesium alloy before and after MAO treatment was evaluated by polarization curves and electrochemical impedance spectroscopy (EIS); the weight loss of magnesium alloy with black MAO ceramic coatings in 3.5% NaCl aqueous solution was studied through immersion experiment. The results indicated that, the black MAO ceramic coatings was composed by Mg、Al、Si、Cu and O; black MAO ceramic coatings could protect magnesium alloy substrate effectively; the corrosion resistant of black MAO ceramic coatings in neutral 3.5% NaCl solution was favorable.

Info:

Periodical:

Advanced Materials Research (Volumes 581-582)

Edited by:

Jimmy (C.M.) Kao, Wen-Pei Sung and Ran Chen

Pages:

427-430

Citation:

S. X. Yu et al., "Microstructure and Corrosion Resistance of Black Microarc Oxidation Ceramic Coatings on Magnesium Alloy", Advanced Materials Research, Vols. 581-582, pp. 427-430, 2012

Online since:

October 2012

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$38.00

[1] LIU Zheng, WANG Yue, WANG Zhong-guang, LI Feng, SHEN Zhi-yong. Developing trends of research and application of magnesium alloys[J]. Chinese Journal of Materials Research, 2000, 14(6): 449−456.

[2] ZENG Rong-cang, KE Wei, XU Yong-bao. Recent development and application of magnesium alloys[J]. Actametallurgica Sinica, 2001, 37(7): 673−685.

[3] ZHU Li-qun, LI Wei-ping, SHAN Dan-dan. Effects of low temperature thermal treatment on zinc and/or tin plated coatings of AZ91D magnesium alloy[J]. Surface and Coatings Technology, 2006, 201(6): 2768−2775.

DOI: https://doi.org/10.1016/j.surfcoat.2006.05.024

[4] JIN Fan-ya, CHUB P K, XUA Gui-dong, ZHAO Jun, TANG De-li, TONG Hong-hui. Structure and mechanical properties of magnesium alloy treated by micro-arc discharge oxidation using direct current and high-frequency bipolar pulsing modes[J]. Materials Science and Engineering A, 2006, 436/446(5): 123−126.

DOI: https://doi.org/10.1016/j.msea.2006.07.059

[5] SHI Hui-ying, YANG Wei, JIANG Bai-ling. Composite technology and coatings obtained by micro-arc oxidation and electrophoresis of AZ31 Mg-based[J]. Journal of Chinese Society for Corrosion and Protection, 2008, 28(3): 155−160.

[6] HSIAO H Y, TSUNG H C. TSAI W T. Anodization of AZ91D magnesium alloy in silicate-containing electrolytes[J]. Surface & Coatings Technology, 2005, 199(2/3): 127−134.

DOI: https://doi.org/10.1016/j.surfcoat.2004.12.010

[7] HOCHE H, SCHEERER H, PROBST D, BROSZEIT E, BERGER C. Development of a plasma surface treatment for magnesium alloys to ensure sufficient wear and corrosion resistance[J]. Surface and coatings Technology, 2003, 174/175: 1018−1023.

DOI: https://doi.org/10.1016/s0257-8972(03)00634-0

[8] Yerokhin A L, Nie X, Leyland A, et al. Plasma electrolysis for surface engineering[J]. Surface and Coatings Technology, 1999, 122(2-3): 73-93.

DOI: https://doi.org/10.1016/s0257-8972(99)00441-7

[9] Yerokhin A L, Nie X, Leyland A, et al. Characterization of oxide films produced by plasma electrolytic oxidation of a Ti-6Al-4V alloy[J]. Surface and Coatings Technology, 2000, 130 (2-3): 195-206.

DOI: https://doi.org/10.1016/s0257-8972(00)00719-2

[10] Hoche H, Scheerer H, Probst D, et al. Development of a plasma surface treatment for magnesium alloys to ensure sufficient wear and corrosion resistance[J]. Surf. Coat. Technol. , 2003, 174-175: 1018–1023.

DOI: https://doi.org/10.1016/s0257-8972(03)00634-0

[11] GUO Hong-fei, AN Mao-zhong, XU Xin, Electrolyte formula optimization of micro-arc oxidation for magnesium alloys and evaluation of film corrosion resistance[J]. Electroplating & Finishing, 2004, 23(6): 1-4.

[12] WANG Ji-hui, YANG Jing, Properties of microarc oxidation coating of magnesium alloy oxidized in silicate system[J], Transactions of Materials and Heat Treatment, 2006, 27(3): 95-131.

[13] WANG Wei-feng, JIANG Bai-ling, LI Jun-ming, SHI Hui-ying. Effect of Processing Parameters on Ceramic Film Colourity of Magnesium Alloy by Microarc Oxidation[J], New Technology & New Process, 2006, (3): 87-89.

[14] JIANG Bai-ling; ZHANG Shu-fen; WU Guo-jian; LEI Ting-quan, Microflaw and phases constitution of ceramic coating formed by micro-arc oxidation on magnesium alloys and their influence on corrosion-resistance[J]. The Chinese Journal of Nonferrous Metals, 2002, 12(3): 454~457.

[15] LIANG Jun; TIAN Jun; ZHOU Jin-fang; LIU Wei-min; XU Tao, Study on structure and properties of microarc oxidation coating on magnesium alloy in phosphate-potassium hydroxide solution[J]. Electroplating & Finishing , 2005, 24(12): 4-7.