Developing a new method for synthesizing amine functionalized g-C3N4 nanosheets for application as anti-corrosion nanofiller in epoxy coatings

Abstract

In this research, the effect of graphitic carbon nitride (g-C 3 N 4) on the corrosion protection performance of solvent-based epoxy coatings is investigated. The g-C 3 N 4 is synthesized by two-step condensation of melamine and is characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, and carbon-hydrogennitrogen elemental analysis. In order to enhance the dispersion of g-C 3 N 4 in epoxy coating, it is chemically functionalized with ethylenediamine vapor via a simple method. Further, epoxy coatings containing different amounts (0, 0.05, 0.1, 0.3, 0.5, and 0.7 wt%) of amine functionalized g-C 3 N 4 (AF g-C 3 N 4) are spray coated on mild steel substrate. The dispersion quality of nanofillers in coating matrix is studied by field emission scanning electron microscopy. The corrosion resistance of samples is investigated by electrochemical impedance spectroscopy. The results reveal the superior corrosion protection of nanocomposite coatings due to barrier performance of AF g-C 3 N 4. Meanwhile, epoxy coating containing 0.5 wt% AF g-C 3 N 4 shows the highest corrosion protection compared to pure epoxy sample. Keywords g-C 3 N 4 • Amine functionalization • Nanocomposite epoxy coating • Corrosion

Emerging Layered Materials and Their Applications in the Corrosion Protection of Metals and Alloys

“…Other materials used to enhance the dispersion of g-C 3 N 4 in waterborne coatings or to enhance its mechanical properties as a filler include polyaniline formed on the surface of g-C 3 N 4 [203], molybdenum oxides, MoO x [205], and SiO 2 with TiO 2 [206]. Also, g-C 3 N 4 has been functionalized with ethylenediamine vapor to enhance its dispersion in a solvent-based epoxy [207]. Clearly, the 2D g-C 3 N 4 nanosheets can be hybridized with other components to design more corrosion-protective coatings.…”

Anticorrosion Improvement of Waterborne Epoxy-Acrylate Coatings by Constructing g-C3N4 Functionalized by Polyaniline-Coated Zinc Phosphate

“…The dispersion of nanomaterials plays a decisive role in improving the anticorrosive ability of coatings; therefore, improving g -C 3 N 4 dispersion in coatings is an important challenge. Pourhashem et al reported that after functionalization of g -C 3 N 4 by ethylenediamine using a chemical method, there is significant improvement in g -C 3 N 4 dispersion and the anticorrosive properties of epoxy (EP) coatings. However, the preparation process is relatively cumbersome.…”

Flame Retardant and Anticorrosion Behavior of Multifunctional Epoxy Nanocomposite Coatings Containing Graphitic Carbon Nitride/Silanized HfO2 Nanofillers for the Protection of Steel Surface in Automobile Industry

“…Seawater acts as a powerful corrosive medium; hence mild steel will certainly face significant corrosion in the harsh marine environment. − Because of the presence of chloride ions or other aggressive species in seawater, the passivity of the steel may be affected by the breakdown of the passive layer. It produces corrosion on the metal surfaces of the infrastructure, which results in a number of problems, including safety risks and significant financial losses due to the time and money needed to repair and replace the equipment. , Corrosion protection technology for mild steel in a marine environment has thus emerged as a popular study area. The researchers are dedicated to pursuing a variety of practical and cost-effective solutions, such as the inclusion of corrosion inhibitors, the application of polymeric coatings that resist corrosion, or electrochemical protection, to increase the lifespan.…”

“…It produces corrosion on the metal surfaces of the infrastructure, which results in a number of problems, including safety risks and significant financial losses due to the time and money needed to repair and replace the equipment. 9,10 Corrosion protection technology for mild steel in a marine environment has thus emerged as a popular study area. The researchers are dedicated to pursuing a variety of practical and cost-effective solutions, such as the inclusion of corrosion inhibitors, the application of polymeric coatings that resist corrosion, or electrochemical protection, to increase the lifespan.…”