This work examined the influence of dual incorporation of MoO₂ and SiO₂ on the corrosion behavior of pure titanium treated via plasma electrolytic oxidation (PEO). To achieve this purpose, pure titanium substrate was treated via PEO in an alkaline-molybdate electrolyte without and with SiO₂ nanoparticles. The microstructural observation revealed that the addition of SiO₂ nanoparticles into the electrolyte during PEO helped to seal the structural defects in the PEO coating so that a rougher, thicker, and denser coating rich in SiO₂ was successfully obtained. From the electrochemical measurements in a 3.5 wt.% NaCl solution, the TiO₂-MoO₂-SiO₂ hybrid coating exhibited a higher corrosion resistance than the TiO₂-MoO₂ coating which was attributed to the sealing effect by stable SiO₂ nanoparticles.

中文翻译：

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钛的等离子电解氧化制备由 TiO2、MoO2 和 SiO2 组成的混合保护涂层

这项工作研究了 MoO ₂和 SiO ₂双重掺入对通过等离子体电解氧化 (PEO) 处理的纯钛腐蚀行为的影响。为了达到这个目的，在没有和有 SiO ₂纳米颗粒的碱性钼酸盐电解质中通过 PEO 处理纯钛基材。微观结构观察表明，在PEO过程中将SiO ₂纳米颗粒添加到电解质中有助于密封PEO涂层中的结构缺陷，从而成功获得更粗糙、更厚、更致密的富含SiO _{2 的}涂层。根据在 3.5 wt.% NaCl 溶液中的电化学测量，TiO ₂ -MoO ₂ -SiO ₂混合涂层表现出比 TiO ₂ -MoO ₂涂层更高的耐腐蚀性，这归因于稳定的 SiO ₂纳米粒子的密封作用。