Electrical discharge coating (EDC) has been applied to prepare a Ca and P-containing layer on Ti as implant applications. This study aimed to enhance Ca and P incorporation in the coating by absorbing HA on gas using gas-assisted perforated electrodes. The effects of gas flow rate and electrode rotational speed on the coating composition and coating thickness were investigated. Using the gas-assisted perforated electrodes at an appropriate gas flow rate (0.02 L/min) enhanced the Ca and P amount in the coating. In addition, an increase in the rotational speed of the electrode decreased the Ca and P amount in the coating. The coating thickness decreased with increasing electrode rotational speed. The EDC-treated Ti exhibits higher surface hardness and corrosion resistance than Ti. After hydrothermal treatment, the needle and prism HA crystals precipitated on the coating surface, exhibiting hydrophilic property. Furthermore, the hydrothermal treatment slightly improves the corrosion resistance of the EDC-treated Ti.

已将放电涂层（EDC）应用于在Ti上制备注入应用中的含Ca和P的层。这项研究旨在通过使用气体辅助穿孔电极吸收气体中的HA来增强涂层中的Ca和P掺入。研究了气体流速和电极转速对涂层组成和涂层厚度的影响。以适当的气体流速（0.02 L / min）使用气体辅助的带孔电极可提高涂层中的Ca和P含量。另外，电极旋转速度的增加降低了涂层中的Ca和P量。涂层厚度随着电极转速的增加而减小。经EDC处理的钛比钛具有更高的表面硬度和耐腐蚀性。经过水热处理后 针状和棱柱形HA晶体沉淀在涂层表面，表现出亲水性。此外，水热处理稍微改善了经EDC处理的Ti的耐腐蚀性。