A new family of borated glasses as a corrosion inhibitor for steel in 1.0 M hydrochloric acid: synthesis and cauterization studies

• A. Elbadaoui¹, M. Galai², S. Ferraa¹, H. Barebita¹, M. Cherkaoui^1,3 and T. Guedira¹

¹ Laboratory of Organic, Inorganic Chemistry, Electrochemistry and Environment, Faculty of Sciences, Ibn Tofaïl University, PO Box 133, 14000, Kenitra, Morocco
² Advanced Materials and Process Engineering, Faculty of Sciences, Ibn Tofaïl University, PO Box 133, 14000, Kenitra, Morocco
³ National Higher School of Chemistry (NHSC), University Ibn Tofail BP. 133-14000, Kenitra, Morocco

Abstract: The influence of (0.90–x)Bi₂O₃–xB₂O₃–(0.05V₂O₅–0.05Nb₂O₃) on the corrosion of mild steel in 1 M HCl was investigated. Electrochemical polarization and impedance spectroscopic studies were used. The submerged surface of steel was studied by scanning electron microscopy coupled with Energy Dispersive X-Ray Spectroscopy (SEM/EDS). The inhibition efficiency increases with B₂O₃ content to reach 92% at 150 ppm. Polarization curves show that NA1 acts as an anodic inhibitor. The inhibition efficiency increases with increasing inhibitor concentration to 98.6% at 150 ppm. On the other hand, electrochemical impedance data show that addition of the 150 ppm NA1 decreases the double layer capacitance and simultaneously increases the charge transfer resistance of the corrosion process. The effect of temperature on the corrosion behavior of mild steel in 1 M HCl without and with addition of 150 ppm NA1 was studied in the temperature range from 298 to 328 K. An increase in temperature leads to a decrease in the inhibition efficiency of both inhibitors. A thermodynamic study showed that the film was formed due to physisorption in the presence of an inhibitor. Scanning electron microscopy (SEM) confirms the performance of our inhibitors against corrosion. Moreover, the results of this study showed that the inhibition efficiencies depend to the B₂O₃, V₂O₃ and Nb₂O₃ content in the system.

Keywords: acid corrosion, glass, surface analysis, polarization, inhibition

Int. J. Corros. Scale Inhib., 2022, 11, no. 2, 666-685
doi: 10.17675/2305-6894-2022-11-2-15

Download PDF (Total downloads: 327)

Back to this issue content: 2022, Vol. 11, Issue 2 (pp. 465-861)