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Effect of urea–formaldehyde nanoparticles on the barrier property and delamination resistance for epoxy coating

Zhe Li (Northeastern University, Shenyang, China)
Hongpeng Zheng (Northeastern University, Shenyang, China)
Li Liu (Northeastern University, Shenyang, China)
Fandi Meng (Northeastern University, Shenyang, China)
Yu Cui (Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China)
Fuhui Wang (Northeastern University, Shenyang, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 28 August 2021

Issue publication date: 17 September 2021

Abstract

Purpose

The purpose of this paper is to investigate the effect of urea–formaldehyde (UF) nanoparticles on the barrier property and delamination resistance for epoxy coating in a 3.5% NaCl aqueous solution.

Design/methodology/approach

The UF resin was synthesized via sol–gel method, and UF/epoxy composite coating was prepared through ball-milling process; the microstructure and chemical composition of UF resin were observed using the Fourier transform infrared spectroscopy, scanning electron microscopy and transmission electron microscopy; the bonding strength of coating/metal interface was investigated through adhesion test; the mechanical properties of the coatings were studied by tensile tests; and the barrier and corrosion resistance properties were verified using salt spray test, cathodic delamination test and electrochemical impedance spectroscopy measurements.

Findings

The experimental results indicated that the UF resin presented uniformly dispersed nanoparticles in the epoxy matrix and enhanced the bonding strength of coating/metal interface and then improved the delamination resistance for composite coating, which resulted in the enhancement of the barrier property and corrosion resistance for UF/epoxy composite coating.

Originality/value

In this paper, an easily prepared blending compounding coating with excellent corrosion resistance property was synthesized via sol–gel method and ball-milling process. The effects of UF nanoparticles on the barrier property and delamination resistance were investigated in detail.

Keywords

Acknowledgements

The authors wish to acknowledge the financial supports of the National Natural Science Foundation of China under the contract No.51871049 and No.52101076, China Postdoctoral Science Foundation under contract No. 2020M680962.

Citation

Li, Z., Zheng, H., Liu, L., Meng, F., Cui, Y. and Wang, F. (2021), "Effect of urea–formaldehyde nanoparticles on the barrier property and delamination resistance for epoxy coating", Anti-Corrosion Methods and Materials, Vol. 68 No. 5, pp. 449-456. https://doi.org/10.1108/ACMM-03-2021-2456

Publisher

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Emerald Publishing Limited

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