Preparation and corrosion resistance of titanium-zirconium/nickel-coated carbon nanotubes chemical nano-composite conversion coatings
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 14 February 2019
Issue publication date: 25 April 2019
Abstract
Purpose
This study aims to expand the reliability and special functions of lightweight materials for high-end equipment and green manufacturing, so that it is the first such research to carry out nano-composite technology of nickel-coated carbon nanotubes (Ni-CNTs)-based titanium-zirconium chemical conversion on aluminum alloy substrate.
Design/methodology/approach
Corrosion behavior of various coatings was investigated using dropping corrosion test, linear polarization and electrochemical impedance spectroscopy. The results showed that the corrosion resistance of the nano-composite conversion coatings was significantly improved to compare with the conventional titanium-zirconium conversion coating. The morphology and microdomain characteristics of the nano-composite conversion coatings were characterized by SEM/eds/EPMA, which indicated that the CNT or Ni-CNTs addition promoting the integrity coverage of coatings in a short time.
Findings
Surface morphology of titanium-zirconium (Ti-Zr)/Ni-CNT specimens exhibited smooth, compact and little pores. The nano-composite conversion coatings are mainly composed of Al, O, C and Ti elements and contain a small amount of F and Zr elements, which illuminated that CNT or Ni-CNT addition could co-deposit with aluminum and titanium metal oxides.
Originality/value
The study of corrosion resistance of nano-composite conversion coatings and the micro-zone film-formation characteristics would be provided theoretical support for the development of basic research on surface treatment of aluminum alloys.
Keywords
Acknowledgements
The authors gratefully acknowledge the funds by the National Natural Science Foundation of China (51372077); the Natural Science Foundation of Hubei Province of China (2017CFB580); the Natural Science Foundation of Hubei Province of China (2017CFB140); and The Research Fund Program of Key Laboratory of Rare Mineral, Ministry of Land and Resources (KLRM-KF201804).
Citation
Wang, X., Li, Z., Zhan, W., Tu, J., Zuo, X., Deng, X. and Gui, B. (2019), "Preparation and corrosion resistance of titanium-zirconium/nickel-coated carbon nanotubes chemical nano-composite conversion coatings", Anti-Corrosion Methods and Materials, Vol. 66 No. 3, pp. 343-351. https://doi.org/10.1108/ACMM-10-2018-2011
Publisher
:Emerald Publishing Limited
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