Corrosion protection of NiTi alloy via micro-arc oxidation doped with ZnO nanoparticles and polyacrylamide sol–gel sealing

Corrosion protection of NiTi alloy via micro-arc oxidation doped with ZnO nanoparticles and polyacrylamide sol–gel sealing

NiTi alloy is considered to have great application potential in the fabrication of metal implant materials. However, the NiTi alloy still suffers from some disadvantages, such as poor corrosion resistance and health hazards caused by the release of nickel ions. In order to improve the corrosion resi...

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Bibliographic Details
Published in:Journal of materials science Vol. 58; no. 34; pp. 13816 - 13830
Main Authors: Meng, Jianbing, Li, Hongmei, Dong, Xiaojuan, Yu, Haoyang, Zhou, Haian, Zhan, Shengjie, Tang, Youquan
Format: Journal Article
Language:English
Published: New York Springer US 01-09-2023
Springer
Springer Nature B.V
Subjects:
Alloys
Characterization and Evaluation of Materials
Charge transfer
Chemistry and Materials Science
Classical Mechanics
Coating
Coatings
Corrosion and anti-corrosives
Corrosion prevention
Corrosion resistance
Crystallography and Scattering Methods
Eddy currents
Electrochemical analysis
Health aspects
Health hazards
Intermetallic compounds
Materials Science
Measuring instruments
Metals & Corrosion
Nanoparticles
Nickel base alloys
Nickel titanides
Oxidation
Polyacrylamide
Polymer Sciences
Sealing
Shape memory alloys
Sol-gel processes
Solid Mechanics
Substrates
Surgical implants
Thickness measurement
Workstations
Zinc oxide
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Summary:NiTi alloy is considered to have great application potential in the fabrication of metal implant materials. However, the NiTi alloy still suffers from some disadvantages, such as poor corrosion resistance and health hazards caused by the release of nickel ions. In order to improve the corrosion resistance of NiTi alloy, a healing composite coating was prepared on NiTi alloys by micro-arc oxidation doped with ZnO nanoparticles and sol–gel sealing with polyacrylamide. The surface morphology, composition, roughness, thickness, and electrochemical performance of the prepared coating were investigated by SEM, EDS, Eddy current thickness gauge, electrochemical workstation, and so on. The adhesion of the prepared coating was also tested using the pull-off method. The results show that compared with NiTi alloy substrate, composite coating of MAO–ZnO@PAM has a dense microstructure, a flatter surface, the largest inner and interfacial charge transfer resistances, outstanding corrosion resistance, and possesses the self-healing ability under the humid condition. Graphical Abstract
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-023-08883-9