Triethanolamine modified graphene oxide for epoxy resin‐based coatings: Corrosion inhibition on metal substrates

Abstract

Graphene oxide is an ideal nanofiller for epoxy resins because of its excellent mechanical properties, high thermal resistance, and abundant oxygen-containing functional groups. However, the poor dispersion of graphene oxide in epoxy resins restricts its application in corrosive environments. In this study, epoxy coating was prepared by incorporating triethanolamine (TEA)-modified graphene oxide (TEA-GO-EP). TEA acted as a modification agent for graphene oxide to improve its dispersion in epoxy and corrosion inhibitor for the underlying copper substrate. The long-term potentiodynamic polarization and electrochemical impedance spectroscopy results demonstrated the improved anti-corrosion performance of the TEA-GO-EP coatings in 3.5 wt.% NaCl aqueous solution, compared with the coatings without TEA. Moreover, the anti-corrosion mechanism was discussed in detail. The findings reported in this paper have important implications for developing new types of eco-friendly epoxy-based coatings.

Electrochemical Deposition and Properties of Ni Coatings with Nitrogen-Modified Graphene Oxide

“…Hydrothermal synthesis proceeded for 20 h at 180 • C. The resulting nitrogen-modified graphene oxide (NMGO) was washed with 250 mL of distilled water and dried at 80 • C for 10 h (Figure 1). The hydrothermal method of graphene oxide modification with triethanolamine has also been used in [32].…”

“…TEA is highly reactive due to the presence of polar tertiary amine functional groups and alcohol hydroxyl groups in the molecule. Inhibition of the TEA corrosion process occurs due to the chemical interaction of TEA functional groups on the metal surface or through electrostatic interactions [32]. In this regard, TEA can act as a modifying agent for nitrogen functionalization of the GO surface.…”

Effect of methyl methacrylate/nitrile rubber/graphene oxide on the anticorrosion and mechanical properties of epoxy‐based coating

“…12,13 Graphene oxide (GO) is an attractive filler to modify epoxy resin due to its outstanding mechanical properties, high thermal resistance, physical barrier property, and abundant oxygen-containing functional groups on its surface as active sites for modification. 14,15 First, GO fills in the holes created by curing the epoxy resin, forming a physical barrier layer with a "labyrinth". 16,17 In addition, GO improves the adhesion between the coating and the substrate by forming covalent bonds.…”