Effect of ortho-substituted aniline on the corrosion protection of aluminum in 2 mol/L H2SO4 solution

Handle URI:
http://hdl.handle.net/10754/627306
Title:
Effect of ortho-substituted aniline on the corrosion protection of aluminum in 2 mol/L H2SO4 solution
Authors:
El-Deeb, Mohamed M.; Alshammari, Hamed M.; Abdel-Azeim, Safwat ( 0000-0001-8611-1251 )
Abstract:
Corrosion protection of aluminum in 2 mol/L HSO solution is examined in the presence of ortho-substituted aniline derivatives using potentiodynamic polarization and electrochemical impedance spectroscopy measurements. Density function theory (DFT) calculations are performed to investigate the aluminum-electrolyte interface relationship in the absence and presence of both ortho-substituted aniline derivatives and sulphate anions, as well as their roles in the protection efficiency at the atomic level. Our results show that ortho-aniline derivatives are good inhibitors and that their efficiencies improved as the concentration increased. SEM-EDX analysis is used to confirm the adsorption thermodynamics of the studied compounds on the aluminum surface. The best inhibitory effect is exhibits in the presence of the methyl group in ortho-position followed by ortho-carboxilic compared to aniline. The adsorption of these compounds on the aluminum surface is well described by Langmuir adsorption isotherm as well as the experimental and the theoretical adosrption energies are in a good agreement. DFT calculations also show that the interaction between the inhibitors and the aluminum surface is mainly electrostatic and depends on the type of the ortho-substituted group in addition to the sulphate anions.
KAUST Department:
KAUST Solar Center (KSC); Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)
Citation:
El-Deeb MM, Alshammari HM, Abdel-Azeim S (2017) Effect of ortho-substituted aniline on the corrosion protection of aluminum in 2 mol/L H2SO4 solution. Canadian Journal of Chemistry 95: 612–619. Available: http://dx.doi.org/10.1139/cjc-2016-0513.
Publisher:
Canadian Science Publishing
Journal:
Canadian Journal of Chemistry
Issue Date:
13-Feb-2017
DOI:
10.1139/cjc-2016-0513
Type:
Article
ISSN:
0008-4042; 1480-3291
Additional Links:
http://www.nrcresearchpress.com/doi/10.1139/cjc-2016-0513
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC); KAUST Solar Center (KSC)

Full metadata record

DC FieldValue Language
dc.contributor.authorEl-Deeb, Mohamed M.en
dc.contributor.authorAlshammari, Hamed M.en
dc.contributor.authorAbdel-Azeim, Safwaten
dc.date.accessioned2018-03-15T06:26:39Z-
dc.date.available2018-03-15T06:26:39Z-
dc.date.issued2017-02-13en
dc.identifier.citationEl-Deeb MM, Alshammari HM, Abdel-Azeim S (2017) Effect of ortho-substituted aniline on the corrosion protection of aluminum in 2 mol/L H2SO4 solution. Canadian Journal of Chemistry 95: 612–619. Available: http://dx.doi.org/10.1139/cjc-2016-0513.en
dc.identifier.issn0008-4042en
dc.identifier.issn1480-3291en
dc.identifier.doi10.1139/cjc-2016-0513en
dc.identifier.urihttp://hdl.handle.net/10754/627306-
dc.description.abstractCorrosion protection of aluminum in 2 mol/L HSO solution is examined in the presence of ortho-substituted aniline derivatives using potentiodynamic polarization and electrochemical impedance spectroscopy measurements. Density function theory (DFT) calculations are performed to investigate the aluminum-electrolyte interface relationship in the absence and presence of both ortho-substituted aniline derivatives and sulphate anions, as well as their roles in the protection efficiency at the atomic level. Our results show that ortho-aniline derivatives are good inhibitors and that their efficiencies improved as the concentration increased. SEM-EDX analysis is used to confirm the adsorption thermodynamics of the studied compounds on the aluminum surface. The best inhibitory effect is exhibits in the presence of the methyl group in ortho-position followed by ortho-carboxilic compared to aniline. The adsorption of these compounds on the aluminum surface is well described by Langmuir adsorption isotherm as well as the experimental and the theoretical adosrption energies are in a good agreement. DFT calculations also show that the interaction between the inhibitors and the aluminum surface is mainly electrostatic and depends on the type of the ortho-substituted group in addition to the sulphate anions.en
dc.publisherCanadian Science Publishingen
dc.relation.urlhttp://www.nrcresearchpress.com/doi/10.1139/cjc-2016-0513en
dc.rightsArchived with thanks to Canadian Journal of Chemistryen
dc.subjectAluminumen
dc.subjectAniline derivativesen
dc.subjectDFTen
dc.subjectEISen
dc.subjectSEM-EDXen
dc.titleEffect of ortho-substituted aniline on the corrosion protection of aluminum in 2 mol/L H2SO4 solutionen
dc.typeArticleen
dc.contributor.departmentKAUST Solar Center (KSC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalCanadian Journal of Chemistryen
dc.eprint.versionPost-printen
dc.contributor.institutionChemistry Department, Faculty of Science, Beni-Suef University, 62514 Beni-Suef, Egypt.en
dc.contributor.institutionChemistry Department, Faculty of Science, Ha’il University, 81451 Hail, P.O. Box 2440, KSA.en
kaust.authorAbdel-Azeim, Safwaten
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