Experimental and Computational Exploration of Chitin, Pectin, and Amylopectin Polymers as Efficient Eco-Friendly Corrosion Inhibitors for Mild Steel in an Acidic Environment: Kinetic, Thermodynamic, and Mechanistic Aspects

Herein, the inhibition impacts of chitin, pectin, and amylopectin as carbohydrate polymers on the corrosion of mild steel in 0.5 M HCl were researched utilizing various experimental and theoretical tools. The acquired outcomes showed that the inhibition efficiencies (% IEs) of the tested carbohydrat...

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Published inPolymers Vol. 15; no. 4; p. 891
Main Authors Fawzy, Ahmed, Toghan, Arafat, Alqarni, Nada, Morad, Moataz, Zaki, Magdi E A, Sanad, Moustafa M S, Alakhras, Abbas I, Farag, Ahmed A
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 10.02.2023
MDPI
Subjects
Adsorption
Aggressiveness
Biopolymers
carbohydrate polymers
Carbohydrates
Chitin
Corrosion
Corrosion inhibitors
Corrosion mechanisms
Corrosion tests
Electrodes
experimental and theoretical studies
Experiments
inhibitors
Low carbon steels
Metals
mild steel
Pectin
Polymer industry
Polymers
Reaction kinetics
Simulation
Steel
Thermodynamics
carbohydrate polymers
inhibitors
corrosion
mild steel
experimental and theoretical studies
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Summary:Herein, the inhibition impacts of chitin, pectin, and amylopectin as carbohydrate polymers on the corrosion of mild steel in 0.5 M HCl were researched utilizing various experimental and theoretical tools. The acquired outcomes showed that the inhibition efficiencies (% IEs) of the tested carbohydrate polymers were increased by raising their concentrations and these biopolymers acting as mixed-kind inhibitors with major anodic ones. The acquired % IEs values were reduced with rising temperature. The higher % IEs of the tested polymers were inferred via powerful adsorption of the polymeric molecules on the steel surface and such adsorption obeyed the Langmuir isotherm. The computed thermodynamic and kinetic quantities confirmed the mechanism of physical adsorption. The kinetics and mechanisms of corrosion and its protection by polymeric compounds were illuminated. The results obtained from all the techniques used confirmed that there was good agreement with each other, and that the % of IEs followed the sequence: chitin > amylopectin > pectin.
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ISSN:2073-4360
2073-4360
DOI:10.3390/polym15040891