Corrosion resistance of MWCNTs-nanoZnO composite reinforced chromium-free Zn-Al coating
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 26 September 2024
Issue publication date: 30 October 2024
Abstract
Purpose
This paper aims to prepare high corrosion-resistant chromium-free zinc-aluminum (Zn–Al) coatings reinforced with multi-walled carbon nanotubes (MWCNTs) and nano-ZnO particle composites.
Design/methodology/approach
The morphology, composition and corrosion resistance of the coatings were analyzed by electrochemical tests, water contact angle tests, immersion tests, scanning electron microscopy/energy dispersive spectrometer and X-ray diffraction.
Findings
The composite coating with 0.3% MWCNTs and 0.5% nano-ZnO particles demonstrated both high shielding performance and cathodic protection performance, which was attributed to the porosity filling of MWCNTs and nano-ZnO particles together with the electrical connection of MWCNTs between the zinc and aluminum powders.
Originality/value
This work laid an experimental foundation for the preparation and corrosion mechanism of high corrosion-resistant chromium-free Zn–Al coating reinforced with MWCNTs and nano-ZnO particles.
Keywords
Acknowledgements
This work was supported by the Sichuan Science and Technology Program (No. 2023YFG0195 and 2023YFG0234).
Declaration of competing interest: The authors declare that they have no known competing financial interests or personal relationships that could have influenced the work reported in this study.
Ethical compliance: The study was approved by the Ethics Committee of Southwest Jiaotong University. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
Citation
Fu, Y., Zhao, J., Li, X. and Peng, Y. (2024), "Corrosion resistance of MWCNTs-nanoZnO composite reinforced chromium-free Zn-Al coating", Anti-Corrosion Methods and Materials, Vol. 71 No. 6, pp. 640-649. https://doi.org/10.1108/ACMM-01-2024-2948
Publisher
:Emerald Publishing Limited
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