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机器臂缸套表面电沉积Ni-P-xZrO2纳米复合镀层性能表征

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  • 1郑州科技学院机械工程学院; 2河南工业大学机电工程学院

网络出版日期: 2025-07-09

Performance Characterization of Ni - P - xZrO2 Nano - Composite Coating by Electrodeposition on Cylinder Liner Surface of Robot Arm

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  • 1. School of Mechanical Engineering, Zhengzhou University of Science and Technology, Zhengzhou 450000, China2. School of Mechanical and Electrical Engineering, Henan University of Technology, Zhengzhou 450000, China

Online published: 2025-07-09

摘要

为了提高机器臂缸套表面电沉积Ni-P复合镀层的综合性能,通过电沉积工艺使ZrO2掺入Ni-P镀层内,研究了Ni-P-xZrO2纳米复合镀层的组织结构、润湿性、硬度以及电化学腐蚀性能。结果表明:逐渐提高电沉积液内的ZrO2含量后,位于8.94°处的ZrO2衍射峰强度不断提高。镀层进行煅烧后析出了Ni与Ni3P 2种物相成分,ZrO2已经掺杂到Ni-P镀层内。当在电沉积液内加入更高含量的ZrO2后,镀层形成了更粗糙的表面,产生了更多树枝晶,镀层表面从最初的亲水性变为疏水性。在一定范围内提高ZrO2含量后可获得硬度更高的Ni-P-ZrO2复合镀层,在ZrO2浓度为5 g/L时复合镀层的硬度最大,接近1 110 kg/mm2。析出硬质相Ni3P的过程中形成了大量的晶界,从而引起大量位错堆积在晶界区域,导致发生应变硬化现象。腐蚀电流密度随着ZrO2含量的增大先降低后增加,最小值发生在ZrO2浓度为5 g/L时;腐蚀电压表现出的规律与之相反。

本文引用格式

王基月, 张曦, 郑喜贵, 刘金涛, 王心超 . 机器臂缸套表面电沉积Ni-P-xZrO2纳米复合镀层性能表征[J]. 材料保护, 2021 , 54(7) : 97 . DOI: 10.16577/j.cnki.42-1215/tb.2021.07.017

Abstract

In order to improve the comprehensive performance of the electrodeposited Ni-P composite coating on the cylinder liner surface of the robot arm, ZrO2 was doped into the Ni-P coating through the electrodeposition process, and the structure, wettability, hardness and electrochemical corrosion performance of the Ni-P-xZrO2 nano-composite coating were studied. Results showed that the intensity of ZrO2 diffraction peak at 8.94° increased continuously with the gradual increase of ZrO2 content in the electrolyte solution. After the calcination of the coating, Ni and Ni3P phase components were precipitated, and ZrO2 was doped into the Ni-P coating. When higher content of ZrO2 was added to the electrodeposition solution, the coating formed a rougher surface and produced more dendrites, and the coating changed from hydrophilic to hydrophobic. After increasing the ZrO2 content within a certain range, the Ni-P-ZrO2 composite coating with higher hardness was obtained, and the maximum hardness of the composite coating was close to 1 110 kg/mm2 when the ZrO2 concentration was 5 g/L. A large number of grain boundaries were formed during the precipitation of hard phase Ni3P, resulting in a large number of dislocation accumulation in the grain boundary area, leading to strain hardening. The corrosion current density decreased first and then increased with the increase of ZrO2 content, and the minimum value was obtained at 5 g/L, whereas the changing law of corrosion voltage was opposite.
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