Abstract

The goal of the present investigation is to evaluate the influences of plating parameters such as TiO₂ nanoparticles concentration in the plating bath and applied current density on the microstructure-related and mechanical properties as well as corrosion behavior of Ni–Co coatings. The coatings were fabricated by different current densities and TiO₂ nanoparticles concentration over the range 2–8 A dm^–2 and 0–30 g/L, respectively. Results demonstrate that the incorporation of TiO₂ nanoparticles into the plating bath coupled with the change in current density can deeply affect the microstructure-related, mechanical properties as well as corrosion resistance of Ni–Co coatings. According to the results, Ni–Co–20 g/L TiO₂ coatings electroplated at current density of 4 A dm^–2 shows the superior properties. The synergistic effects of higher Co amount coupled with the higher volume fraction of TiO₂ throughout the microstructure of the coating is responsible for the above-mentioned improvements.

中文翻译：

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TiO 2纳米粒子浓度的评估以及施加的电流密度在确定Ni-Co合金涂层的微结构，机械和腐蚀性能中的作用

摘要

本研究的目的是评估诸如镀液中的TiO ₂纳米颗粒浓度和所施加的电流密度之类的电镀参数对与Ni-Co涂层有关的微观结构和力学性能以及腐蚀行为的影响。涂层是通过不同的电流密度和TiO ₂纳米颗粒浓度分别在2-8 A dm ^-2和0-30 g / L的范围内制成的。结果表明，将TiO ₂纳米粒子掺入电镀液中以及电流密度的变化会深刻影响与Ni-Co涂层有关的组织，机械性能以及耐蚀性。根据结果​​，Ni–Co–20 g / L TiO ₂在4 A dm ^–2的电流密度下电镀的镀层显示出优越的性能。在整个涂层的微观结构中，较高的Co量与较高的TiO ₂体积分数相结合的协同作用是上述改进的原因。