This research was undertaken to study the effect of Zr-enhanced plasma electrolytic oxidation (PEO) as a pretreatment on the corrosion performance of epoxy coating applied on Magnesium in 3.5 wt.% NaCl solution. The parameters of delamination index along with coating damage index were extracted through electrochemical impedance spectroscopy (EIS) tests to determine how Zr may affect the corrosion protection of duplex PEO/epoxy coated samples. Pull-off adhesion tests were also accomplished to form a better understanding of Zr-enhanced PEO coating’ function. According to the obtained results, the presence of Zr can reduce the damage to the coating system by almost twice.

本研究旨在研究 Zr 增强等离子体电解氧化 (PEO) 作为预处理对在 3.5 wt.% NaCl 溶液中涂在镁上的环氧涂层的腐蚀性能的影响。通过电化学阻抗谱 (EIS) 测试提取分层指数和涂层损伤指数的参数，以确定 Zr 如何影响双相 PEO/环氧涂层样品的腐蚀保护。还完成了拉脱附着力测试，以更好地了解 Zr 增强 PEO 涂层的功能。根据获得的结果，Zr 的存在可以将涂层系统的损坏降低近两倍。