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Application Of Kinetics – Thermodynamics Model And Adsorption Mechanisms For Inhibition Of Acid Corrosion On Mild Steel By Red Onion Peel Extract

The study of kinetics–thermodynamics parameters and adsorption isotherms of the inhibition of corrosion mild steel in acid medium using red onion peel extract (ROPE) as green corrosion inhibitor was carried out. The inhibition efficiency was found to increase with increasing inhibitor concentration...

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Main Author: Mansor, Nuramirah
Format: Monograph
Language:English
Published: Universiti Sains Malaysia 2021
Subjects:
T Technology
TP Chemical Technology
Online Access:http://eprints.usm.my/55033/1/Application%20Of%20Kinetics%20%E2%80%93%20Thermodynamics%20Model%20And%20Adsorption%20Mechanisms%20For%20Inhibition%20Of%20Acid%20Corrosion%20On%20Mild%20Steel%20By%20Red%20Onion%20Peel%20Extract_Nuramirah%20Mansor_K4_2021_ESAR.pdf
http://eprints.usm.my/55033/
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spelling my.usm.eprints.55033 http://eprints.usm.my/55033/ Application Of Kinetics – Thermodynamics Model And Adsorption Mechanisms For Inhibition Of Acid Corrosion On Mild Steel By Red Onion Peel Extract Mansor, Nuramirah T Technology TP Chemical Technology The study of kinetics–thermodynamics parameters and adsorption isotherms of the inhibition of corrosion mild steel in acid medium using red onion peel extract (ROPE) as green corrosion inhibitor was carried out. The inhibition efficiency was found to increase with increasing inhibitor concentration but decrease with increasing temperature of acid medium because at higher temperature the mild steel is oxidized at higher rate and causing the inhibitor to desorb back from mild steel surface. The value for heat of adsorption, Qads ranged from -39.89 to -41.71 KJ.mol-1 indicates that the reaction is exothermic. The adsorption data fitted well to Langmuir adsorption isotherm model. Thermodynamic equations were used to determine the activation energy (Ea), enthalpy change (∆H) and entropy change (∆S). The adsorption isotherms such as Langmuir, Freundlich, Flory–Huggins, Temkin, and Frumkin were used to evaluate the change of Gibb’s free energy from the adsorption equilibrium constant, Kads, value. The adsorption of the inhibitor on surface of mild steel was found to be spontaneous and consistent with the physical adsorption mechanism as ∆Gads is negative value and less than -20 KJ.mol-1. Universiti Sains Malaysia 2021-06-01 Monograph NonPeerReviewed application/pdf en http://eprints.usm.my/55033/1/Application%20Of%20Kinetics%20%E2%80%93%20Thermodynamics%20Model%20And%20Adsorption%20Mechanisms%20For%20Inhibition%20Of%20Acid%20Corrosion%20On%20Mild%20Steel%20By%20Red%20Onion%20Peel%20Extract_Nuramirah%20Mansor_K4_2021_ESAR.pdf Mansor, Nuramirah (2021) Application Of Kinetics – Thermodynamics Model And Adsorption Mechanisms For Inhibition Of Acid Corrosion On Mild Steel By Red Onion Peel Extract. Project Report. Universiti Sains Malaysia, Pusat Pengajian Kejuruteraan Kimia. (Submitted)
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
language English
topic T Technology
TP Chemical Technology
spellingShingle T Technology
TP Chemical Technology
Mansor, Nuramirah
Application Of Kinetics – Thermodynamics Model And Adsorption Mechanisms For Inhibition Of Acid Corrosion On Mild Steel By Red Onion Peel Extract
description The study of kinetics–thermodynamics parameters and adsorption isotherms of the inhibition of corrosion mild steel in acid medium using red onion peel extract (ROPE) as green corrosion inhibitor was carried out. The inhibition efficiency was found to increase with increasing inhibitor concentration but decrease with increasing temperature of acid medium because at higher temperature the mild steel is oxidized at higher rate and causing the inhibitor to desorb back from mild steel surface. The value for heat of adsorption, Qads ranged from -39.89 to -41.71 KJ.mol-1 indicates that the reaction is exothermic. The adsorption data fitted well to Langmuir adsorption isotherm model. Thermodynamic equations were used to determine the activation energy (Ea), enthalpy change (∆H) and entropy change (∆S). The adsorption isotherms such as Langmuir, Freundlich, Flory–Huggins, Temkin, and Frumkin were used to evaluate the change of Gibb’s free energy from the adsorption equilibrium constant, Kads, value. The adsorption of the inhibitor on surface of mild steel was found to be spontaneous and consistent with the physical adsorption mechanism as ∆Gads is negative value and less than -20 KJ.mol-1.
format Monograph
author Mansor, Nuramirah
author_facet Mansor, Nuramirah
author_sort Mansor, Nuramirah
title Application Of Kinetics – Thermodynamics Model And Adsorption Mechanisms For Inhibition Of Acid Corrosion On Mild Steel By Red Onion Peel Extract
title_short Application Of Kinetics – Thermodynamics Model And Adsorption Mechanisms For Inhibition Of Acid Corrosion On Mild Steel By Red Onion Peel Extract
title_full Application Of Kinetics – Thermodynamics Model And Adsorption Mechanisms For Inhibition Of Acid Corrosion On Mild Steel By Red Onion Peel Extract
title_fullStr Application Of Kinetics – Thermodynamics Model And Adsorption Mechanisms For Inhibition Of Acid Corrosion On Mild Steel By Red Onion Peel Extract
title_full_unstemmed Application Of Kinetics – Thermodynamics Model And Adsorption Mechanisms For Inhibition Of Acid Corrosion On Mild Steel By Red Onion Peel Extract
title_sort application of kinetics – thermodynamics model and adsorption mechanisms for inhibition of acid corrosion on mild steel by red onion peel extract
publisher Universiti Sains Malaysia
publishDate 2021
url http://eprints.usm.my/55033/1/Application%20Of%20Kinetics%20%E2%80%93%20Thermodynamics%20Model%20And%20Adsorption%20Mechanisms%20For%20Inhibition%20Of%20Acid%20Corrosion%20On%20Mild%20Steel%20By%20Red%20Onion%20Peel%20Extract_Nuramirah%20Mansor_K4_2021_ESAR.pdf
http://eprints.usm.my/55033/
_version_ 1745563223060381696
score 13.211869

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