Incorporation of Fe ₃ O ₄ /CNTs nanocomposite in an epoxy coating for corrosion protection of carbon steel

Abstract

In this study Fe 3 O 4 /CNTs composite with magnetic property was prepared by attaching magnetic nanoparticles (Fe 3 O 4 ) to carbon nanotubes (CNTs) by hydrothermal method. The obtained Fe 3 O 4 /CNTs composite was characterized by Fourier transform infrared (FTIR) spectroscopy, powder x-ray diffraction and transmission electron microscopy. The Fe 3 O 4 /CNTs composite was then incorporated into an epoxy coating at concentration of 3 wt%. Corrosion protection of epoxy coating containing Fe 3 O 4 /CNTs composite was evaluated by electrochemical impedance spectroscopy and adhesion measurement. The impedance measurements show that Fe 3 O 4 /CNTs composite enhanced the corrosion protection of epoxy coating. The corrosion resistance of the carbon steel coated by epoxy coating containing Fe 3 O 4 /CNTs composite was significantly higher than that of carbon steel coated by clear epoxy coating and epoxy coating containing CNTs. FE-SEM photographs of fracture surface of coatings showed good dispersion of Fe 3 O 4 /CNTs composite in the epoxy matrix.

Protective Coatings Based on PMMA–Silica Nanocomposites Reinforced with Carbon Nanotubes

“…Protective hybrid coatings, modified with CNTs, have also been subject of a number of recent studies. Thus, for example, Fe 3 O 4 nanoparticles attached to CNTs have been incorporated successfully at a concentration level of 3 wt.% into epoxy resin coatings deposited on carbon steel [11]. Experimental results showed a significant increase of coating adhesion and corrosion protection efficiency relative to coatings without both the Fe 3 O 4 nanoparticles and the CNTs [11].…”

“…Thus, for example, Fe 3 O 4 nanoparticles attached to CNTs have been incorporated successfully at a concentration level of 3 wt.% into epoxy resin coatings deposited on carbon steel [11]. Experimental results showed a significant increase of coating adhesion and corrosion protection efficiency relative to coatings without both the Fe 3 O 4 nanoparticles and the CNTs [11]. Epoxy-CNT composite coatings deposited on aluminum alloy 2024-T3 substrates at CNT levels of 0.1 wt% or 0.5 wt% showed a similar result with an improvement in adhesion strength, wear resistance and rate of corrosion with CNT loading, the latter explained by a CNT-induced decrease of the level of open porosity within the coating [12].…”

Bifunctional Peptide‐Assisted Synthesis of Magnetic Carbon Nanotubes for Toluidine Blue Dye Remediation in Aqueous Conditions

“…[24] Visualizing this peak was difficult as a peak in the range of 1600-1650 cm À 1 due to scissor bending vibration of H 2 O molecules or a peak in the range of 1577-1640 cm À 1 due to C=C stretching vibration would obscure the peptide peak. [25,26,27] As seen in Figure 1, a small peak at 1650 cm À 1 can be seen in the Method B peptide sample titled "B-FeO_CNT_M6AÀ B1", indicating the possible presence of M6AÀ B1 peptide in the sample. However, due to the small contribution, these results indicate that a large concentration of peptide may not have been retained during synthesis.…”