Green corrosion inhibition and adsorption characteristics of leaf extract on mild steel in hydrochloric acid environment.

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ID: 93337
2020
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Abstract
The corrosion inhibition of Leaf Extract (LCLE) was investigated using gravimetric, depth of attack and surface analysis techniques. Effect of inhibitor concentrations (0.50-1.00 g/l), temperatures (30-60 °C) and immersion time (4-12 h) was studied on the Inhibition Efficiency (IE) of the extract on Mild Steel (MS) immersed in a 0.5 M HCl solution. The constituents of the proposed inhibitor were identified by using a GC-MS. The media solutions and adsorbed film on MS were characterized using FTIR Spectrophotometer. SEM microgram and surface tester were applied for studying surface morphology and depth of attack profile. The optimum IE of 87.89% was obtained. The LCLE adsorption on MS followed Langmuir isotherm and pseudo-second-order adsorption kinetics. Activation energy (28.71 kJ/mol), entropy (- 0.15 kJ/mol. K), average enthalpy (-28.00 kJ/mol) and Gibbs free energy (-11.43 kJ/mol) obtained at optimum condition indicate exothermic process and physical adsorption mechanism. The result obtained in this study compared well with many reported green inhibitors for MS corrosion.
Reference Key
ogunleye2020greenheliyon Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Ogunleye, O O;Arinkoola, A O;Eletta, O A;Agbede, O O;Osho, Y A;Morakinyo, A F;Hamed, J O;
Journal Heliyon
Year 2020
DOI
10.1016/j.heliyon.2020.e03205
URL
Keywords
adsorption kinetics efficiency isotherms chemical engineering optimization thermodynamics chemical synthesis materials characterization corrosion inhibition corrosion rate electrochemical engineering luffa cylindrica

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