Electrochemical Investigation of The Inhibitory Effect of Zinc Oxide Nanoparticles/Tenofovir Disoproxil Fumarate Nanocomposite on Mild Steel Corrosion in 1 M Hydrochloric Acid

Mchihi, Msenhemba Moses; Odozi, Nnenna Winifred; Gbolahan, Shittu Alhameen

doi:10.22034/abec.2024.714079

Electrochemical Investigation of The Inhibitory Effect of Zinc Oxide Nanoparticles/Tenofovir Disoproxil Fumarate Nanocomposite on Mild Steel Corrosion in 1 M Hydrochloric Acid

Document Type : Original Article

Authors

Msenhemba Moses Mchihi ¹

Nnenna Winifred Odozi ²

Shittu Alhameen Gbolahan ³

¹ Department of Chemical Science, School of Science, Yaba College of Technology Lagos, Nigeria

² Department of Chemistry, Faculty of Science, University of Ibadan, Nigeria

³ Department of Science Education, School of Technical Education, Yaba College of Technology Lagos, Nigeria

10.22034/abec.2024.714079

Abstract

Corrosion of mild steel is a disturbing phenomenon that deserves effective measures to avert accidents, equipment breakdown, and economic downturns. The corrosion inhibitory potentials of zinc oxide nanoparticles/tenofovir disoproxil fumarate nanocomposite (Z+D) was investigated using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS). PDP analysis revealed that the alteration in corrosion potential values in the presence of Z+D (compared to corrosion potential obtained in the absence of Z+D) was less than 85 mV which suggest that Z+D operated as a mixed-type inhibitor. Corrosion current density (I_corr) decreased tremendously from 1241 μAcm^-2 (in the absence of Z+D) to 321 μA
cm^-2 in the presence of 1000 ppm of the inhibitor. The inhibition efficiency increased with an increase in concentration of inhibitor to reach 74% when 1000 ppm of the inhibitor was introduced. EIS studies revealed a tremendous increase in charge transfer resistance (R_ct) from 3533 Ω cm² (in the absence of the inhibitor) to 21464×cm² when 1000 ppm of Z+D was introduced. The highest inhibition efficiency (i.e 84%) computed from EIS analysis was obtained when 1000 ppm of the inhibitor was introduced. Electrochemical findings suggest that Z+D exhibited good attributes as a corrosion inhibitor for mild steel in 1 M hydrochloric acid.

Keywords

Corrosion inhibitor

Tenofovir disoproxil fumarate

Mild steel

Acid

Nanocomposite

Electrochemical study

Subjects