ZnO纳米颗粒掺杂对镍钛合金表面微弧氧化膜层形貌及性能的影响

doi:10.11896/cldb.22110123

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Abstract In view of the problem that NiTi alloy is corroded and releases a large amount of nickel ions under the complex physiological environment in the body, ZnO nanoparticles were added to the electrolyte with NaAlO₂, C₁₀H₁₄N₂Na₂O₈ and Na₂HPO₄·12H₂O as the main components, a corrosion-resistant ceramic oxide film was fabricated on the surface of nickel titanium alloy using micro arc oxidation technology. Pareto’s law and normal distribution curve were introduced to analyze the effects of ZnO nanoparticles on the porosity and pore size of MAO film. Moreover, the effects of ZnO nanoparticles on the surface morphology, composition, phase structure, corrosion resistance and wettability of the film were investigated by SEM, EDS, electrochemical workstation, and water contact angle. The results show that MAO film doped with ZnO nanoparticles is more smooth and compact, the porosity decreases by 65.3%, the average pore size decreases from 0.518 μm to 0.321 μm. With the doping of nanoparticle ZnO, the amount of O, Al and Zn elements on the surface of the film increases, while the Ni element decreases. Furthermore, after doping, the surface resistance modulus of the composite film increases, the dynamic potential polarization curve shifts to the left, the self-corrosion potential increases by 32.4%, and the current density decreases by an order of magnitude.

Key words： NiTi alloy micro-arc oxidation ZnO doping film morphology corrosion resistance

Published: 10 July 2024 Online: 2024-08-01

CLC number:

TG178

Fund:Natural Science Foundation of Shandong Province (ZR2021ME159, ZR2021ME211).

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	Articles by authors
	LI Hongmei
	MENG Jianbing
	YU Haoyang
	DONG Xiaojuan
	ZHOU Haian
	ZHAN Shengjie
	TANG Youquan

Cite this article:

LI Hongmei,MENG Jianbing,YU Haoyang, et al. Effects of Nano-ZnO Doping on Morphology and Properties of Micro-arc Oxidation Film on NiTi Alloy Surface[J]. Materials Reports, 2024, 38(13): 22110123-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22110123 OR http://www.mater-rep.com/EN/Y2024/V38/I13/22110123

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