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Friction-wear and Corrosion Resistance of Brush Plated
Ni-CNTs/PTFE Nano-composite Coatings |
LI Xiaobing1, TONG Xianliang1, YANG Renxian1, LIU Yidong1, WAN Qifa1,
MEI Luyao2, WANG Jiaming3
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1 School of Mechanical Engineering, Nanchang University, Nanchang 330031;
2 School of Material Science and Engineering,
Nanchang University, Nanchang 330031;
3 School of Advanced Study, Nanchang University, Nanchang 330031 |
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Abstract The excellent wear resistance and corrosion resistance are needed for composite coating of remanufacturing parts. The composite coatings of Ni-CNTs, Ni-CNTs/PTFE and Ni-WC/PTFE-CNTs were prepared on 45 steel surfaces with brush pla-ting. The surface morphology and microstructure of coatings were observed by XRD or SEM, and the properties of dry friction and wear were measured by ball on disc wear tester, then the corrosion resistance was tested with potentiodynamic polarization curve in 3.5% NaCl solution. The results showed that the Ni-WC/PTFE-CNTs composite coating had the best wear resistance, and was followed by that of Ni-CNTs/PTFE and Ni-CNTs, which were all better than pure Ni coating. The wear resistance of the Ni-CNTs composite coating with 1.5 g/L was the best. The corrosion resistance of the Ni-CNTs composite coating with 1.0 g/L was the best, and was followed by the wear and corrosion resistance of Ni-WC/PTFE-CNTs, Ni-CNTs/PTFE composite coatings. The worn mechanism of pure Ni coating and Ni-CNTs composite coating were adhesive wear, while the worn mechanism of Ni-CNTs/PTFE composite coating was mainly adhesive wear, and was followed by abrasive wear, and the worn mechanism of Ni-WC/PTFE-CNTs composite coating was mainly abrasive wear and contact fatigue wear.
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Published: 25 March 2017
Online: 2018-05-02
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2017, Vol. 31 
