A New Family of Borated Glasses as a Corrosion Inhibitor for Carbon Steel in Acidic Medium (1.0 M HCl)

Elbadaoui, Azeddine; Galai, Mouhsine; Ferraa, Soumya; Barebita, Hanane; Cherkaoui, Mohammed; Guedira, Taoufiq

A New Family of Borated Glasses as a Corrosion Inhibitor for Carbon Steel in Acidic Medium (1.0 M HCl)

Document Type : Original Article

Authors

Azeddine Elbadaoui ¹

Mouhsine Galai ²

Soumya Ferraa ¹

Hanane Barebita ¹

Mohammed Cherkaoui ¹

Taoufiq Guedira ¹

¹ Laboratory of Materials, Electrochemistry and Environment, Faculty of Science, Ibn Tofail University, Kénitra, Morocco

² Laboratory of Materials Engineering and Environment: Modelling and Application, University Ibn Tofail, Faculty of Sciences, Department of Chemistry, PO Box 133 – 14000- 16 Kenitra, Morocco

Abstract

The corrosion inhibition of carbon steel in acidic medium (1 M HCl) containing a borated vitreous glasses was studied by electrochemical technique (potentiodynamic polarization and electrochemical impedance spectroscopy).The various vitreous samples were synthesized from ammonium dihydrogen phosphate (NH4) 2HPO4), the niobium oxide Nb2O5, the Bi2O3 bismuth oxide, the B2O3 boron oxide and the niobium oxide Nb2O5. The vitreous compositions are correlated with the system Bi2O3-B2O3- (0.5Nb2O5 -0.5P2O5) by stoichiometric mixing. These phases were characterized by X-ray diffraction (XRD) and infrared spectroscopy (IR). Polarization curve technique reveals that the inhibition efficiency E% increased with the concentration of the different borated vitreous which appears to be a anodic type inhibitors in the acidic medium. Electrochemical impedance spectroscopy confirms this result, indeed the transfer resistance increases with these compounds concentration. The action mechanism of vitreous phases has been elucidated by a thermodynamic study.

Keywords

Borated glasses

Corrosion inhibitor

Steel

1.0 M Hydrochloric acid