Effect of graphene nanosheets on the properties of Ni-W-ZrO2 composite coating

被引：0

作者：

Zhang L. ^{[1
]}

Zhan Z. ^{[1
]}

Cheng D. ^{[1
]}

Ma H. ^{[1
]}

机构：

[1] School of Mechanics and Safety Engineering Science, Zhengzhou University, Zhengzhou

来源：

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2022年 / 39卷 / 08期

关键词：

composite electrodeposition; corrosion resistance; graphene nanosheets; Ni-W-ZrO[!sub]2[!/sub; orthogonal experiments; tribology;

D O I：

10.13801/j.cnki.fhclxb.20210916.007

中图分类号：

学科分类号：

摘要：

In order to improve the microhardness and corrosion resistance of Ni-W-ZrO2 composite coating, Ni-W-ZrO2-graphene nanosheets (GNPs) composite coating was prepared on 7075 aluminum alloy by electrodeposition method, and GNPs was used to improve the surface performance of Ni-W-ZrO2 composite coating. Orthogonal experiment was used to optimize the experimental process conditions: the current density was 10 A/dm2, the stirring speed was 250 r/min, and the temperature was 60℃. Under the optimal process conditions, ZrO2 nanoparticles maintain 10 g/L, change the content of GNPs (1, 2, 3, 4 g/L), and seek the best GNPs addition amount of Ni-W-10 g/L ZrO2-GNPs composite coating. The microhardness and abrasion resistance were studied by the microhardness tester and the rotating friction tester, and the microscopic characterization was carried out by SEM, EDS, XRD and AFM. The corrosion resistance of Ni-W-ZrO2-GNPs composite coating in 3.5wt%NaCl solution was studied by electrochemical method. The results show that GNPs and ZrO2 nanoparticles are uniformly co-deposited in the nickel-tungsten coating, and the incorporation of GNPs has a significant effect on the microscopic morphology, grain size, microhardness, friction performance and corrosion resistance of the Ni-W-ZrO2 composite coating. When the amount of GNPs added is 3 g/L, the grain size of the Ni (W) matrix is the smallest, the microhardness (HV 942) is the highest, and the average friction coefficient (0.1981) is the smallest. When the amount of GNPs is 2 g/L, the corrosion resistance of Ni-W-ZrO2-GNPs composite coating (Charge transfer resistance Rct: 9532 Ω·cm2) is significantly improved compared to Ni-W-ZrO2 composite coating (Rct: 1766 Ω·cm2). © 2022 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

引用

页码：4074 / 4084

页数：10

共 28 条

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