Evaluation of the Anticorrosion Performance of CeO2-Modified Graphene Oxide Nanocomposite Epoxy Coating Subjected to Simulated Saline-Alkali Solution

Abstract

In the marine service environment, metal materials have a serious risk of corrosion. The corrosion rate of metal materials will be accelerated by the dual action of temperature change and alkali salt in saline-alkali environment. In order to delay the metal materials’ corrosion rate and prolong their service life, this paper used a CeO2–GO (4:1) nanocomposite prepared by the hydrothermal synthesis method to make an anticorrosion coating. The anticorrosion performance was evaluated by stereo microscope and 3D images of the corrosion site were fitted for calculation. The state evolution of the CeO2–GO (4:1)/EP coating immerged in a simulated saline-alkali solution was studied by open circuit potential (OCP), electrochemical alternating current impedance spectroscopy (EIS), Mott–Schottky curve and Tafel curve. The results indicated that CeO2–GO (4:1) nanocomposites exhibited good resistance compared with graphene oxide and nano cerium oxide in a simulated saline-alkali environment. The research in this paper lays a firm theoretical foundation for the application of nano cerium-oxide-modified graphene oxide anticorrosive coating in saline-alkali environment engineering.

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

“…According to corrosion studies, the PAM-TiO 2 hybrid composite’s structure improves the barrier coating effectiveness of epoxy coatings on metal surfaces . Due to their wear protection, corrosion resistance, and strong adhesion, transition metal-based oxide nanoparticles such TiO 2 , SiO 2 , CuO, ZnO, ZrO 2 , CeO 2 , Fe 2 O 3 , and Al 2 O 3 are utilized to improve the corrosion resistance of polymer coatings. − In addition to these oxides, hafnium­(IV) oxide (HfO 2 ) is a well-liked oxide coating because of its enhanced corrosion resistance qualities. Due to its high chemical stability, melting point, adhesion, superior wear and corrosion resistance, and lack of toxicity, hafnium­(IV) oxide (HfO 2 ) is thought to be the dominating phase among the other phases. − The mechanical properties of the coating might be enhanced, and its water permeability could be decreased, according to research, when HfO 2 nanoparticles are dispersed in polymer matrix.…”

Anti-corrosive agents based benzil-thiocarbohydrazone macrocyclic ligand-derived Cu (II) and Zn (II) chelates: template synthesis and physically admixing with epoxy coating

“…Liu et al (2021) have shown that sodium lignosulfonate loaded with CaCO 3 microparticles (SLS/CaCO 3 ) when mixed as a new composite with epoxy coating has showed an improved anticorrosion activity of Q235 steel sheets against ionic environment (3.5 Wt.% NaCl solution) in contrast to EP coating. Lyu et al (2022) have successfully prolonged the life of carbon steel in a simulated saline–alkali medium by application of compatible reformulated epoxy coating nanocomposite film (CeO 2 -GO/EP). A research work conducted by Wang et al (2022) afforded long-term corrosion protection for the steel plates under 3.5 Wt.% NaCl solution (260 days) and high-pressure oxygen environment (10 days) owing to the protective film, which is offered by the newly fabricated waterborne epoxy coating (N-CQDs@Gr/WEP) that is embedded with N-doped carbon quantum dots-modified graphene (N-CQDs@Gr).…”