Experimental and theoretical corrosion inhibition efficiency investigation of selenium dioxide nanoparticles coated on carbon steel alloy in a saline medium

• M.A. Turki, T.A. Salman and M. Abdallh

Chemistry Department, College of science, Al-Nahrain University, Jadriya, Baghdad, Iraq

Abstract: Nanoscale metal oxides possess distinct physical and chemical characteristics that are being increasingly utilized in various fields, such as industry, medicine, and agriculture. This study investigates the use of nano selenium dioxide (SeO₂-NPs) as a corrosion inhibitor for carbon steel alloys. Carbon steel alloys were coated with different amounts of SeO₂-NPs using the electrochemical deposition method. Using a potentiostat device, polarization curves were produced to determine important corrosion parameters, including corrosion potential (E_corr) and corrosion current density (i_corr). The thermodynamic parameters ΔG (Gibbs free energy change), ΔS (entropy change), and ΔH (enthalpy change) were assessed, together with kinetic parameters such as activation energy (E_a) and the Arrhenius factor (A), throughout a temperature range of 198 K to 318 K. Significantly, applying a layer of SeO₂-NPs to the alloy at a concentration of 0.03 M resulted in an outstanding 99% protection efficiency under certain temperature circumstances. Microscopic imaging techniques, such as atomic force microscopy (AFM), scanning electron microscopy (SEM), and energy-dispersive X-Ray spectroscopy (EDX), were used to analyze the surface and composition before and after coating. The results highlighted the substantial ability of nano selenium dioxide to suppress corrosion, supported by both electrochemical and thermodynamic data. This study enhances corrosion protection measures for carbon steel alloys by demonstrating the effectiveness of nanotechnology in improving the durability and lifespan of materials in corrosive conditions. These developments show potential for a range of industrial applications where preventing corrosion is extremely important, such as in infrastructure, biomedical devices, and agricultural equipment.

Keywords: nanoscale carbon steel, corrosion inhibitor, electrochemical deposition, protective efficiency

Int. J. Corros. Scale Inhib., 2024, 13, no. 3, 1649-1663
doi: 10.17675/2305-6894-2024-13-3-16

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