Abstract

Ni–Co–BN (h) nanocomposite coating was prepared by jet electrodeposition (JED) under different temperatures. The surface morphology, element composition, crystal structure, microhardness and corrosion resistance of the samples prepared at different temperatures were analyzed and characterized by scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD), microhardness tester, electrochemical workstation, respectively. The experimental results showed that the micro-protrusions on the sample surface gradually changed from spherical to diamond with the variation of the temperature, and the consistency of the micro-protrusions was improved. The coating thickness and the Co content of the samples first increased and then decreased with the change of the temperature. The deposition temperature changed the gain size of the samples, but it had no obvious effect on the crystal structure. The crystal structure of all the samples was still face centered cubic (fcc) structure. When the temperature was 60°C, the sample had better performances in the microhardness and the corrosion resistance. Under this parameter, the average value of the microhardness reached 608.5 HV_0.05, the corrosion current density was 0.54 μA/cm², and the corrosion rate was 6.51 μm/year.

中文翻译：

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温度对喷射电沉积 Ni-Co-BN (h) 纳米复合涂层性能的影响

摘要

Ni-Co-BN (h) 纳米复合涂层是通过喷射电沉积 (JED) 在不同温度下制备的。采用扫描电子显微镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)、显微硬度计对不同温度下制备的样品的表面形貌、元素组成、晶体结构、显微硬度和耐腐蚀性能进行分析表征，电化学工作站，分别。实验结果表明，随着温度的变化，样品表面的微凸起逐渐由球形变为菱形，并提高了微凸起的一致性。样品的涂层厚度和 Co 含量随着温度的变化先增加后减少。沉积温度改变了样品的增益大小，但对晶体结构没有明显影响。所有样品的晶体结构仍为面心立方（fcc）结构。当温度为60℃时，试样的显微硬度和耐腐蚀性能较好。在该参数下，显微硬度平均值达到608.5 HV_0.05，腐蚀电流密度为0.54μA/cm ²，腐蚀速率为6.51μm/年。