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Corrosion Inhibition Mechanism of Mild Steel by Amylose-AcetateCarboxymethyl Chitosan Composites in Acidic Media
Joint Authors
Erna, Maria
Herdini, Herdini
Futra, Dedi
Source
International Journal of Chemical Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-02-14
Country of Publication
Egypt
No. of Pages
12
Abstract EN
This article details an investigation on the mechanism of corrosion inhibition of mild steel using amylose-acetate-blended carboxymethyl chitosan (AA-CMCh) in acidic media in the context of kinetic and thermodynamic parameters.
The surface of mild steel was exposed to test solutions and evaluated using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX).
The activation energy (Ea), free energy of adsorption (ΔG), enthalpy of activation (ΔHads), and entropy of activation (ΔSads) were determined in order to elucidate the mechanism of corrosion inhibition.
The results confirmed that AA could be improved using CMCh as a corrosion inhibitor.
The corrosion rate decreased from 1109.00 to 229.70 mdd (79.29%), while corrosion inhibition increased from 35.13 to 89.72%.
Sulfate acid (H2SO4) of 0.25 M also helped in decreasing the corrosion rate from 2664.4 to 1041.67 mdd (60.9%) while also in increasing corrosion inhibition from 56.94 to 68.31%.
The calculated values for ΔG, ΔHads, and ΔSads were −33.22 kJ·mol−1, −48.56 kJ·mol−1, and 0.0495 kJ·mol−1·K−1, respectively.
The mechanism of corrosion inhibition of mild steel in the acidic condition is dominated and precipitated by the formation of the Fe-chelate compound, which was confirmed by the SEM/EDS spectrum.
The reactions were spontaneous, exothermic, and irregular and takes place on the surface of mild steel.
American Psychological Association (APA)
Erna, Maria& Herdini, Herdini& Futra, Dedi. 2019. Corrosion Inhibition Mechanism of Mild Steel by Amylose-AcetateCarboxymethyl Chitosan Composites in Acidic Media. International Journal of Chemical Engineering،Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1158757
Modern Language Association (MLA)
Erna, Maria…[et al.]. Corrosion Inhibition Mechanism of Mild Steel by Amylose-AcetateCarboxymethyl Chitosan Composites in Acidic Media. International Journal of Chemical Engineering No. 2019 (2019), pp.1-12.
https://search.emarefa.net/detail/BIM-1158757
American Medical Association (AMA)
Erna, Maria& Herdini, Herdini& Futra, Dedi. Corrosion Inhibition Mechanism of Mild Steel by Amylose-AcetateCarboxymethyl Chitosan Composites in Acidic Media. International Journal of Chemical Engineering. 2019. Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1158757
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1158757