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首页> 外文期刊>Surface & Coatings Technology >Effects of sonication on anticorrosive and mechanical properties of electrodeposited Ni-Zn-TiO_2 nanocomposite coatings
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Effects of sonication on anticorrosive and mechanical properties of electrodeposited Ni-Zn-TiO_2 nanocomposite coatings

机译：超声处理对电沉积Ni-Zn-TiO_2纳米复合镀层耐蚀性和力学性能的影响

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摘要

Ni-Zn-TiO_2 nanocomposite coating was fabricated using the electrodeposition process with the aid of ultrasonic vibration (0, 108, 135, 162 and 216Wcm~(-2) ultrasonic power densities) onmild steel disks. The properties of the nanocomposite film were investigated using scanning electron microscopy (SEM), energy dispersive X-ray (EDX), EDX-mapping, Vickers microhardness test, Tafel polarization test and electrochemical impedance spectroscopy (EIS). The results revealed a significant improvement of anticorrosive properties and hardness of the nanocomposite coatings compared to Ni-Zn alloy coating. E_(corr) became more positive and changed from -0.921 V for Ni-Zn alloy coating to -0.789 V for Ni-Zn-TiO_2 nanocomposite coating. I_(corr) decreased from 1.25 × 10~(-5) A cm~(-2) for Ni-Zn alloy coating to 3.46 × 10~(-6) A cm~(-2) for Ni-Zn-TiO_2 nanocomposite coating. On the other hand, hardness increased from253 HV for Ni-Zn alloy coating to 876 HV for Ni-Zn-TiO_2 nanocomposite coating. The improvements were related not just to the content of nano-TiO_2 in the coatings but also to surface homogeneity and nanoparticles uniform dispersion in the matrix of the coating.
机译：利用电沉积工艺在低碳钢盘上利用超声振动（0、108、135、162和216Wcm〜（-2）超声功率密度）制备了Ni-Zn-TiO_2纳米复合涂层。使用扫描电子显微镜（SEM），能量色散X射线（EDX），EDX映射，维氏显微硬度测试，Tafel极化测试和电化学阻抗谱（EIS）研究了纳米复合膜的性能。结果表明，与Ni-Zn合金涂层相比，纳米复合涂层的防腐性能和硬度有了显着提高。 E_（corr）变得更正，从Ni-Zn合金涂层的-0.921 V变为Ni-Zn-TiO_2纳米复合涂层的-0.789V。 I_（corr）从Ni-Zn合金涂层的1.25×10〜（-5）A cm〜（-2）降至Ni-Zn-TiO_2纳米复合材料的3.46×10〜（-6）A cm〜（-2）涂层。另一方面，硬度从Ni-Zn合金涂层的253HV增加到Ni-Zn-TiO_2纳米复合涂层的876HV。这些改进不仅与涂料中纳米TiO_2的含量有关，而且还与表面均匀性和纳米颗粒在涂料基质中的均匀分散有关。

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