Journal
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
Volume 18, Issue -, Pages 5087-5102Publisher
ELSEVIER
DOI: 10.1016/j.jmrt.2022.04.123
Keywords
Mild steel; Dicationic IL; ZnO nanorod; Corrosion protection; Nanocomposite coating; FT-IR; AFM/FE-SEM
Funding
- Kuwait Univer-sity Research Administration [GE03/08, GE01/07, GE 01/17, GS 01/05, GS 03/01]
- Kuwait University Research Administration
- General Facilities Project [GE03/08, GE01/07, GE 01/17, GS 01/05, GS 03/01]
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A dicationic ionic liquid was synthesized and used for the hydrothermal preparation of rod-shaped nanostructured ZnO. A hydrophobic nanocomposite coating of ZnO with polystyrene was fabricated, showing promising corrosion protection properties for mild steel.
A dicationic ionic liquid, [BisOct (MIM)(2)][2Br], was successfully synthesized and used for the hydrothermal preparation of rod-shaped nanostructured ZnO with a basic hexagonal wurtzite growth unit. A hydrophobic nanocomposite coating of ZnO with polystyrene (ZnO/PS) was fabricated and characterized using Fourier transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis. The effect of nanocomposite coatings with different percentages of ZnO (1, 3, and 5 wt.%) was explored for mild steel corrosion protection in NaCl (3.5 wt.%) saline solution using electrochemical impedance spectroscopy (EIS), atomic force microscopy (AFM), and FE-SEM. The EIS results showed a significant increase in the charge transfer resistance, with the highest value of 4.83 x 10(5) omega cm(2) in the presence of PS/ZnO-5, which acted as an efficient passivating barrier for the diffusion of corrosive ions. The results revealed that embedding ZnO nanorods significantly enhanced the corrosion-protection properties of the PS coating. The results of this study may contribute to the design of anticorrosive coatings for industrial applications. (C) 2022 The Author(s). Published by Elsevier B.V.
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