Zirconium-Doped Ceria Nanoparticles as Anticorrosion Pigments in Waterborne Epoxy–Polymer Coatings

Cite this: ACS Appl. Nano Mater. 2021, 4, 1, 834–849
Publication Date (Web):December 22, 2020
https://doi.org/10.1021/acsanm.0c03162
Copyright © 2020 American Chemical Society
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Abstract

The use of anticorrosion pigments in polymeric coatings is an effective way for the prevention of corrosion of metals. Ceria nanoparticle-based pigments are excellent replacement for conventional chromate-based inhibitors that create severe toxicity and health hazards. The corrosion inhibition mechanism of ceria is associated with its Ce4+ ↔ Ce3+ redox shuttle and ability to form insoluble precipitates over the metallic substrate. Zirconium doping in ceria can enhance its redox properties by creating a large number of oxygen vacancies. However, corrosion inhibition properties of zirconium-doped ceria are not studied yet. In the present work, ceria–zirconia solid solutions (CexZr1–xO2 nanoparticles) with different doping concentrations of Zr have been prepared using coprecipitation synthesis. X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy studies revealed the formation of ceria–zirconia solid solutions with increased oxygen defect density. Thermogravimetric analysis exhibited enhanced oxygen storage capacity for Ce–Zr solid solutions. CexZr1–xO2 nanoparticle-filled waterborne epoxy resin coating has been prepared on a mild steel substrate using the spin-coating technique. Electrochemical corrosion measurements were employed to analyze the corrosion inhibition properties of the coatings. Tafel polarization results and electrochemical impedance spectroscopy analysis show excellent corrosion resistance for zirconium-doped ceria nanoparticle-filled epoxy coating. The corrosion resistance of the zirconium-doped ceria-epoxy coating increased with an increase in the doping concentration of Zr for Ce-rich Ce–Zr solid solutions (0.6 ≤ x ≤ 0.8). The corrosion inhibition property of ceria–zirconia solid solutions is attributed to the improvement in their redox properties due to a large number of oxygen vacancies.

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The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsanm.0c03162.

  • FE-SEM images, EDAX spectra, Williamson Hall plot, and TGA graph of CexZr1–xO2 nanoparticles; FE-SEM images, EDAX spectra and maps, Bode phase angle plot, and EIS equivalent circuit parameters for the coatings; and optical microscopy images of the corroded mild steel surface (PDF)

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Cited By


This article is cited by 4 publications.

  1. Edgar Andrés Chavarriaga, Tiago Bender Wermuth, Alex Arbey Lopera. Nanomaterials for Inorganic Pigments. 2022,,, 185-194. https://doi.org/10.1007/978-3-030-86901-4_11
  2. Ziyang Zhou, Xiaohong Ji, Sepideh Pourhashem, Jizhou Duan, Baorong Hou. Investigating the effects of g-C3N4/Graphene oxide nanohybrids on corrosion resistance of waterborne epoxy coatings. Composites Part A: Applied Science and Manufacturing 2021, 149 , 106568. https://doi.org/10.1016/j.compositesa.2021.106568
  3. Chenyang Zhang, Wen Li, Cong Liu, Chunfeng Zhang, Lin Cao, Debao Kong, Wei Wang, Shougang Chen. Effect of Covalent Organic Framework Modified Graphene Oxide on Anticorrosion and Self-healing Properties of Epoxy Resin Coatings. Journal of Colloid and Interface Science 2021, 320 https://doi.org/10.1016/j.jcis.2021.10.024
  4. Natthapong Pongpichayakul, Kanlayawat Wangkawong, Paralee Waenkaew, Li Fang, Burapat Inceesungvorn, Jaroon Jakmunee, Surin Saipanya. Pt electrodeposited on CeZrO4/MCNT as a new alternative catalyst for enhancement of ethanol oxidation. International Journal of Hydrogen Energy 2021, 46 (46) , 23682-23693. https://doi.org/10.1016/j.ijhydene.2021.04.168