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Facile self-assembly fabrication of anticorrosive imine-based composite material for excellent protective coatings.
- Source :
-
Progress in Organic Coatings . Jan2024, Vol. 186, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- Designing suitable additive materials for high-performance anti-corrosion coatings continues to be a formidable obstacle. Although imine molecules are a promising family of organic compounds due to the π-conjugated aromatic structure containing N heteroatoms, their research as the anticorrosive additives is still in its early stages. Herein, we have prepared a rod-like imine molecule, Hexaazatrinaphthalene (HATN), which was further assembled with reduced graphene oxide (rGO) to obtain a novel HATN/rGO composite via a facile electrostatic self-assembly. As such, the HATN/rGO composite as additive material was incorporated into epoxy resin to develop a corrosion-resistant HATN/rGO epoxy coating, showing exceptional passive and active anti-corrosion properties with a low corrosion rate of 5.75 × 10−6 mm a−1 and a high corrosion inhibition efficiency of 99.83 %. Remarkably, the resistance at 0.01 Hz value of HATN/rGO epoxy coating is superior to those of rGO-based epoxy coatings previously reported. Scanning vibrating electrode technique (SVET) and salt spray measurements further demonstrate long-term performance of the HATN/rGO epoxy coating with excellent corrosion resistance. Additionally, theoretical calculation proves that the obvious electron transfer from rGO to HATN molecule promotes charge-transfer capability and electrochemical activity of the HATN/rGO composite, suggesting its great potential as the additive material for high-performance corrosion protection. [Display omitted] • An imine-based composite is fabricated via a facile electrostatic self-assembly for the first time. • DFT calculations reveal high electrochemical activity and charge-transfer ability of the composite. • The composite acts as an anticorrosive filler for epoxy coating with passive and active properties. • Salt spray and SVET technique demonstrate long-term anti-corrosion performance of the coating. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03009440
- Volume :
- 186
- Database :
- Academic Search Index
- Journal :
- Progress in Organic Coatings
- Publication Type :
- Academic Journal
- Accession number :
- 173975717
- Full Text :
- https://doi.org/10.1016/j.porgcoat.2023.108017