Preparation and corrosion resistance of titanium-zirconium/nickel-coated carbon nanotubes chemical nano-composite conversion coatings. Issue 3 (7th May 2019)

• Record Type: Journal Article
• Authors: Wang, Xiaobo; Li, Zhipeng; Zhan, Wen; Tu, Jesong; Zuo, Xiaohua; Deng, Xiangyi; Gui, Boyi
• Is Part Of: Anti-corrosion methods and materials. Volume 66:Issue 3(2019)
• Page Start: 343
• Page End: 351
• Publication Date: 2019-05-07
• Subjects: Corrosion resistance -- Microdomain -- Nano-composite conversion coating -- Nickel-coated carbon nanotubes; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1108/ACMM-10-2018-2011
• Languages: English
• ISSNs: 0003-5599

Abstract

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.