【摘 要】
：
Plasma electrolytic oxidation (PEO) coatings were prepared on AZ31 magnesium alloy using alkaline phosphate as base electrolyte system, and with the addition of sodium silicate (Na2SiO3), sodium aluminate (NaAlO2) and potassium fluorozirconate (K2ZrF6) as
【机 构】
：
School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China;Jiangsu K
【出 处】
：
武汉理工大学学报（材料科学版）（英文版）
论文部分内容阅读
Plasma electrolytic oxidation (PEO) coatings were prepared on AZ31 magnesium alloy using alkaline phosphate as base electrolyte system, and with the addition of sodium silicate (Na2SiO3), sodium aluminate (NaAlO2) and potassium fluorozirconate (K2ZrF6) as additives. The microstructure, phase composition and element composition as well as surface profile of the PEO coatings were analyzed by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), and three-dimensional (3D) optical profilometry. The corrosion and wear properties were evaluated by electrochemical potentiodynamic polarization in 3.5 wt％ NaCl solution and ball-on-disc wear tests, respectively. The results showed that the anions of the additives effectively participated in the coating formation influencing its microstructural features, chemical composition, corrosion resistance and tribological behaviour. It was observed that the sample treated by PEO in the electrolyte solution containing K2ZrF6 as an additive showed better corrosion and abrasive resistance.
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