Reinforcement of magnetite-montmorillonite on the cathodic delamination of epoxy-based organic coating

Thu Thuy Thai; Dieu Thao Nguyen; Thi Thao Nguyen; Gia Vu Pham; Hoan Nguyen Xuan; Anh Truc Trinh

doi:10.15625/2525-2518/18289

Author affiliations

Authors

Thu Thuy Thai \(^1\) Institute of Materials Science, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet street, Nghia Do ward, Ha Noi, Viet Nam https://orcid.org/0000-0002-0901-2388
Dieu Thao Nguyen \(^2\) Faculty of Chemistry, VNU University of Science, 19 Le Thanh Tong street, Cua Nam ward, Ha Noi, Viet Nam https://orcid.org/0009-0000-6765-1666
Thi Thao Nguyen \(^1\) Institute of Materials Science, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet street, Nghia Do ward, Ha Noi, Viet Nam https://orcid.org/0009-0004-8463-5456
Gia Vu Pham \(^1\) Institute of Materials Science, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet street, Nghia Do ward, Ha Noi, Viet Nam
Hoan Nguyen Xuan \(^2\) Faculty of Chemistry, VNU University of Science, 19 Le Thanh Tong street, Cua Nam ward, Ha Noi, Viet Nam https://orcid.org/0000-0002-7442-5082
Anh Truc Trinh \(^1\) Institute of Materials Science, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet street, Nghia Do ward, Ha Noi, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/18289

Keywords:

corrosion, cathodic delamination, magnetite, montmorillonite, EIS

Abstract

This study proposes a method to reinforce the cathodic delamination capacity of organic coating on carbon steel. Epoxy-based coating containing 5 wt.% magnetite-montmorillonite particles which were prepared via co-precipitation method. The crystallization of magnetite particles in-situ on the surface of organo-montmorillonite were confirmed by XRD diffraction and FT-IR spectra. When used as filler in epoxy resin, the magnetite-montmorillonite-based coating showed an improvement of adhesion resulting in the reinforcement of internal strength between epoxy film and the substrate. The cathodic delamination results showed that the permeation of electrolyte through the scratch was reduced and the resistance to the cathodic disbondment was also improved. The electrochemical impedance measurements confirmed the anticorrosion improvement of the coating containing magnetite-montmorillonite particles.

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References

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