Abstract The Ni coating is one of metal coatings that are commonly deposited by electrodeposition for corrosion inhibition. The addition of particles such as TiN and Co in the Ni coating modifies coating properties. In the present work, Ni–TiN and Ni-Co-TiN composite coatings with different amounts of TiN microparticles were prepared by using the electrodeposition technique. Different characterization methods including X-ray diffraction (XRD), scanning electron microscopy (SEM), Energy Dispersive X-ray analysis (EDX) and Vicker's microhardness tester were used to investigate the effects of adding cobalt and TiN microparticles on the surface morphology, grain size, and hardness of the Ni-TiN and Ni-Co-TiN composite coatings. The electrochemical corrosion behavior of the composite coating was evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) in NaCl solution. The addition of cobalt in the Ni–Co-TiN composite coating resulted in the grain size decrease (≈41.8 nm) and hardness increase. The microstructure analysis showed that, the (111) planes were the close packed planes compared with the (200) planes. Thus, with adding Co and TiN particles the (200) texture changed to the (111) texture. The electrochemical analysis showed that, the anti-corrosion behavior of the Ni-Co-TiN composite coating significantly enhanced by adding Co and TiN particles.

中文翻译：

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用于腐蚀保护的 Ni-TiN 和 Ni-Co-TiN 复合涂层：制造和电化学表征

摘要 镍镀层是一种常用的电沉积方法沉积以起到缓蚀作用的金属镀层。在 Ni 涂层中添加诸如 TiN 和 Co 之类的颗粒会改变涂层性能。在目前的工作中，通过使用电沉积技术制备了具有不同量 TiN 微粒的 Ni-TiN 和 Ni-Co-TiN 复合涂层。采用 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、能量色散 X 射线分析 (EDX) 和维氏显微硬度计等不同表征方法研究了添加钴和 TiN 微粒对表面形貌、晶粒Ni-TiN 和 Ni-Co-TiN 复合涂层的尺寸和硬度。通过动电位极化和电化学阻抗谱（EIS）在NaCl溶液中评估复合涂层的电化学腐蚀行为。在 Ni-Co-TiN 复合涂层中添加钴导致晶粒尺寸减小 (≈41.8 nm) 和硬度增加。微观结构分析表明，与（200）面相比，（111）面是密堆积面。因此，通过添加 Co 和 TiN 颗粒，（200）织构变为（111）织构。电化学分析表明,Co和TiN颗粒的加入显着提高了Ni-Co-TiN复合涂层的防腐性能。微观结构分析表明，与（200）面相比，（111）面是密堆积面。因此，通过添加 Co 和 TiN 颗粒，（200）织构变为（111）织构。电化学分析表明,Co和TiN颗粒的加入显着提高了Ni-Co-TiN复合涂层的防腐性能。微观结构分析表明，与（200）面相比，（111）面是密堆积面。因此，通过添加 Co 和 TiN 颗粒，（200）织构变为（111）织构。电化学分析表明,Co和TiN颗粒的加入显着提高了Ni-Co-TiN复合涂层的防腐性能。