Characterization of ceramic coating on ZK60 magnesium alloy prepared in a dual electrolyte system by micro-arc oxidation

• Published in: Rare metals Vol. 32; no. 5; pp. 459 - 464
• Main Authors: Wang, Ze-Xin, Lv, Wei-Gang, Chen, Jing, Lu, Sheng
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.10.2013; Springer Nature B.V; Provincial Key Laboratory of Advanced Welding Technology,Jiangsu University of Science and Technology,Zhenjiang 212003, China%Zhenjiang Naisi New Materials Co., Ltd., Zhenjiang 212000,China
• Subjects: Biomaterials; Chemistry and Materials Science; Energy; Materials Engineering; Materials Science; Metallic Materials; NaCl溶液; Nanoscale Science and Technology; Physical Chemistry; X-射线衍射; ZK60镁合金; 制备; 微弧氧化; 电解质体系; 表征; 陶瓷涂层; Characterization; ZK60 magnesium alloys; Micro-arc oxidation; Dual electrolyte system
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-013-0152-8

Micro-arc oxidation （MAO） process was cartied out in an optimized dual electrolyte system to fabricate a compact, smooth, and corrosion resistant coating on ZK60 Mg alloy. The microstructural characteristics of coating were investigated by scanning electron microscopy （SEM） coupled with an energy dispersive spectrometer （EDS） and X-ray diffraction （XRD）. Test of mass loss was conducted at a 3.5 % NaCl solution to assess the resistance to corrosion. The bonding strength between the coating and ZK60 substrate was evaluated using scratch experiment. The results reveal that MgA1204 and MgO are the main phases of ceramic coating obtained in the dual electrolyte system. The corrosion rate of coating prepared in the optimized dual electrolyte is only 0.0061 g.m-2.h-1, which demonstrates excellent corrosion resistance. This is mainly due to the compact, uniform coating with high bonding strength.