Selective Laser Melting (SLM), one of the metal additive manufacturing methods in the powder bed, is frequently used in the production of 316L stainless steel biomaterial. In this study, the effect of duplex surface modification (metal additive manufacturing and plasma oxidizing) on the corrosion resistance of 316L was investigated. Ti6Al4V layer was formed by additive manufacturing on 316L produced by selective laser melting method. The obtained layered Ti6Al4V/316L samples were oxidized by plasma at 650 °C–750 °C and 1 h–4 h parameter conditions. TiO₂ ceramic layer was formed on the Ti6Al4V/316L structure by plasma oxidation process in several layer thicknesses. Corrosion properties of the TiO₂ layer were determined by Open Circuit Potential (OCP), potentiodynamic polarization, and Electrochemical Impedance Spectroscopy (EIS) tests in Simulated Body Fluid (SBF) solution. Also, the surface characterizations of the samples were determined by the Vickers micro-hardness tester, Scanning Electron Microscopy (SEM), and X-Ray Diffractometer (XRD) analysis. From the results, it was obtained that the corrosion resistance of the plasma oxidized was higher than the untreated 316L and layered Ti6Al4V/316L samples. The best corrosion resistance was obtained under the 750 °C and 4 h parameter conditions because of the increasing plasma oxidizing time and temperature.

选择性激光熔化 (SLM) 是粉末床中的金属增材制造方法之一，经常用于生产 316L 不锈钢生物材料。在这项研究中，研究了双相表面改性（金属增材制造和等离子氧化）对 316L 耐腐蚀性的影响。Ti6Al4V层是在选择激光熔化法生产的316L上通过增材制造形成的。获得的层状 Ti6Al4V/316L 样品在 650°C–750°C 和 1 h–4 h 参数条件下通过等离子体氧化。通过等离子体氧化工艺在Ti6Al4V/316L结构上形成多层厚度的TiO ₂陶瓷层。TiO _{2 的}腐蚀性能在模拟体液 (SBF) 溶液中，通过开路电位 (OCP)、动电位极化和电化学阻抗谱 (EIS) 测试确定层。此外，样品的表面特征由维氏显微硬度计、扫描电子显微镜 (SEM) 和X射线衍射仪 (XRD) 分析确定。结果表明，等离子体氧化后的耐腐蚀性能高于未处理的316L和层状Ti6Al4V/316L样品。由于等离子体氧化时间和温度的增加，在 750 °C 和 4 h 参数条件下获得了最佳的耐腐蚀性。