Experimental and Theoretical Investigation of Corrosion Inhibitive Potentials of (E)-4-hydroxy-3-[(2,4,6-tribromophenyl)diazenyl]benzaldehyde on Mild Steel in Acidic Media

Authors

Christopher Aboluwoye Department of Chemical Sciences, Adekunle Ajasin University, Akungba-Akoko, Ondo State, Nigeria.

Dare Olayanju Department of Chemistry, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria

Justinah Amoko Department of Chemistry, Adeyemi College of Education, Ondo, Ondo State, Nigeria

Olawale Akinyele Department of Chemistry, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria

Oluwatoba Oyeneyin Adekunle Ajasin University, Akungba-Akoko, Ondo State, Nigeria

Abstract:

Corrosion of metal surfaces amongst other problems is one major disaster militating against proper functioning of the oil and gas and other manufacturing industries. To therefore lessen the risk, organic corrosion inhibitors have been applied to lessen the rate of corrosion and its effects. However, materials with optimal properties, better than content that allow corrosion are used for this empirical research. (E)-4-hydroxy-3-(2,4,6-tribromophenyl)diazenyl)benzaldehyde was synthesized and elucidated via FTIR, UV/Vis and NMR (1H and 13C) spectroscopy. Weight loss and potentiodynamic polarization methods were understudy to determine the rate of corrosion (Cr) and percentage inhibition efficiency (%IE). The mechanism of adsorption agrees with the Langmuir adsorption isotherm. The surface morphology of the mild steel was determined using the SEM in the bi-condition of the presence and absence of inhibitor. Inhibition efficiency (IE) was varied with concentration and temperature. The results revealed that IE increased with high concentration of the inhibitor but reduced while the temperature was increased. The SEM revealed the formation of protective layer of the attachment of the inhibitor to the metal surface. The results from the experiments agreed well with those obtained from DFT methods. AD3 could therefore be used as an anticorrosive agent in the petroleum industry.

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Journal title

Physical Chemistry Research

volume 8 issue 3

pages 399- 416

publication date 2020-09-01

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Keywords

Adsorption Isotherm Surface morphology Density functional theory Scanning electron microscopy

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