To improve the corrosion resistance of the Ti–0.3Mo–0.8Ni (TA10) titanium alloy, a micro-arc oxidation coating was prepared on its surface, and the effect of different amounts of graphite addition on the structure and corrosion resistance of the coatings was studied. Through methods such as X-ray diffraction phase analysis, microscopic morphology analysis, roughness analysis, coating thickness analysis and hardness testing, it was found that the added graphite particles can react with silicon (Si) in the electrolyte to promote the formation of the silicon carbide (SiC) phase, thereby improving the surface morphology of the coatings, increasing the thickness of the coatings and improving the microhardness of the coatings. At the same time, dynamic potential polarization curve and scanning electrochemical test results show that the formation of the silicon carbide phase can increase self-corrosion potential and reduce self-corrosion current density. When the amount of graphite added is 1.0 g/l, the self-corrosion potential and self-corrosion current density are −0.129 V and 2.9 × 10⁻⁸ A/cm², respectively. This indicates that adding graphite particles can enhance the corrosion resistance of the TA10 titanium alloy.

中文翻译：

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添加石墨的TA10钛合金微弧氧化涂层性能研究

为提高Ti-0.3Mo-0.8Ni(TA10)钛合金的耐蚀性能，在其表面制备微弧氧化涂层，研究不同量石墨添加对涂层结构和耐蚀性能的影响被研究了。通过X射线衍射物相分析、显微形貌分析、粗糙度分析、涂层厚度分析和硬度测试等方法发现，添加的石墨颗粒可以与电解液中的硅（Si）发生反应，促进硅的形成。碳化物（SiC）相，从而改善涂层的表面形貌，增加涂层的厚度，提高涂层的显微硬度。同时，动电位极化曲线和扫描电化学测试结果表明，碳化硅相的形成可以提高自腐蚀电位，降低自腐蚀电流密度。当石墨添加量为1.0g/l时，自腐蚀电位为-0.129V，自腐蚀电流密度为2.9×10 ^-8  A/cm ²。这表明添加石墨颗粒可以增强TA10钛合金的耐腐蚀性能。