Effect of Nano-TiO2 Particles on Properties of Ni-W-P Alloy Coating

被引：0
|
作者：
Wang X.-H. [1 ]
Liu H. [1 ]
Jiang Y.-G. [1 ]
Li Z.-S. [1 ]
Su P. [2 ]
Long W. [2 ]
Wang S.-B. [3 ]
机构：
[1] Southwest Petroleum University, Chengdu
[2] Petroleum Engineering Technology Research Institute of Northwest Oilfield Branch of Sinopec, Urumqi
[3] Chongqing University, Chongqing
来源：
Surface Technology | 2022年 / 51卷 / 01期
关键词：
2024 aluminum alloy; chemical plating; composite coating; corrosion resistance; microstructure; nano-TiO[!sub]2[!/sub; Ni-W-P coating;
D O I：
10.16490/j.cnki.issn.1001-3660.2022.01.009
中图分类号：
学科分类号：
摘要：
This paper is to explore the effect of Nano-TiO2 particles on the microstructure, corrosion resistance and wear resistance of Ni-W-P coating, and improve the corrosion resistance of 2024 aluminum alloy pipe. Ni-W-P/TiO2 nanocomposite coating was prepared on the surface of 2024 aluminum alloy by electroless plating. The surface morphology, surface element distribution and phase of the coating were characterized by SEM, EDS and XRD. The microhardness and wear resistance of the traditional Ni-W-P coating and the prepared Ni-W-P/TiO2 nanocomposite coating were compared. The results show that the grain of the coating is refined after adding nano-TiO2 particles. EDS results show that nano-TiO2 particles are evenly distributed in the coating. The phase analysis shows that the coating is nanocrystalline. The average grain size of the coating is 9.706 nm after adding nano-TiO2 particles, which is 0.612 nm smaller than that of Ni-W-P coating. The weight loss test shows that the Ni-W-P/TiO2 nanocomposite coating with the content of Cl– is 2×105 mg/L formation water has strong corrosion resistance, and the corrosion rate is 0.1062 g/(m2·h), which is 21% lower than that of Ni-W-P coating, 31% lower than that of Ni coating and 69% lower than that of aluminum alloy substrate. The electrochemical results show that the self corrosion potential of Ni-W-P/TiO2 nanocomposite coating is 0.0813 V, 0.1668 V and 0.4141 V higher than that of Ni-W-P coating, Ni coating and 2024 aluminum alloy, respectively, and the corrosion tendency is lower. Compared with Ni-W-P coating, Ni coating, Ni-W-P/TiO2 nanocomposite coating has the highest microhardness (535.6HV) and wear resistance (0.1942 mg/min). The addition of nano-TiO2 particles can reduce the grain size of the coating, make the coating surface more compact, improve the hardness of the coating, and enhance the corrosion resistance and wear resistance of the coating. © 2022, Chongqing Wujiu Periodicals Press. All rights reserved.
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页码：86 / 92and104
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