Experimental and theoretical insights into the corrosion inhibition activity of novel Schiff bases for aluminum alloy in acidic medium
Document identifier: oai:DiVA.org:ltu-76679
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10.1039/c9ra07105aKeyword: Natural Sciences,
Chemical Sciences,
Physical Chemistry,
Naturvetenskap,
Kemi,
Fysikalisk kemi,
Chemistry of Interfaces,
Gränsytors kemiPublication year: 2019Relevant Sustainable Development Goals (SDGs):
The SDG label(s) above have been assigned by OSDG.aiAbstract: Three novel Schiff bases, namely N-(4-((4-((phenylimino)methyl)phenoxy)methoxy)benzylidene)benzenamine (UA), N-(3-methoxy-4-((2-methoxy-4-((phenylimino)methyl)phenoxy)methoxy)benzylidene)benzenamine (UB), and N-(3-ethyl-4-((2-ethyl-4-((phenylimino)methyl)phenoxy)methoxy)benzylidene)benzenamine (UC), were synthesized and their structures were elucidated through diverse spectroscopic techniques such as FT-IR, GC-MS, 1H NMR and 13C NMR. The corrosion inhibition effect of these Schiff bases on aluminum alloy AA2219-T6 in acidic medium was explored using weight loss, Tafel polarization, and electrochemical impedance spectroscopy. Theoretical quantum chemical calculations using density functional theory were employed to determine the adsorption site. It was found that inhibition efficiencies increase with an increase in the inhibitor concentration. Tafel plots showed that these Schiff bases function as mixed inhibitors. Adsorption of the Schiff bases on aluminum followed the Langmuir adsorption isotherm and the value of 
showed a dominant chemical mechanism. FT-IR and SEM techniques were used to investigate the surface morphology. The compounds showed a substantial corrosion inhibition for aluminum alloy in 0.1 M HCl at 298 K. UB and UC exhibited superior anticorrosion efficiency compared to UA originating from the electron-donating methoxy and ethoxy group substitutions, respectively. There was found to be good correlation between molecular structure and inhibition efficiencies.
Authors
Uzma Nazir
Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
Other publications
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Zareen Akhter
Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
Other publications
>>
Ali Naveed Zafar
National Center for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan
Other publications
>>
Faiz Ullah Shah
Luleå tekniska universitet; Kemiteknik
Other publications
>>
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identifier: oai:DiVA.org:ltu-76679
datestamp: 2021-04-19T12:37:35Z
setSpec: SwePub-ltu
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recordInfo:
recordContentSource: ltu
recordCreationDate: 2019-11-11
identifier:
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-76679
10.1039/c9ra07105a
2-s2.0-85074967548
titleInfo:
@attributes:
lang: eng
title: Experimental and theoretical insights into the corrosion inhibition activity of novel Schiff bases for aluminum alloy in acidic medium
abstract: Three novel Schiff bases namely N-(4-((4-((phenylimino)methyl)phenoxy)methoxy)benzylidene)benzenamine (UA) N-(3-methoxy-4-((2-methoxy-4-((phenylimino)methyl)phenoxy)methoxy)benzylidene)benzenamine (UB) and N-(3-ethyl-4-((2-ethyl-4-((phenylimino)methyl)phenoxy)methoxy)benzylidene)benzenamine (UC) were synthesized and their structures were elucidated through diverse spectroscopic techniques such as FT-IR GC-MS 1H NMR and 13C NMR. The corrosion inhibition effect of these Schiff bases on aluminum alloy AA2219-T6 in acidic medium was explored using weight loss Tafel polarization and electrochemical impedance spectroscopy. Theoretical quantum chemical calculations using density functional theory were employed to determine the adsorption site. It was found that inhibition efficiencies increase with an increase in the inhibitor concentration. Tafel plots showed that these Schiff bases function as mixed inhibitors. Adsorption of the Schiff bases on aluminum followed the Langmuir adsorption isotherm and the value of http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/Articleimage/2019/RA/C9RA07105A/c9ra07105a-t1.gif\ /> showed a dominant chemical mechanism. FT-IR and SEM techniques were used to investigate the surface morphology. The compounds showed a substantial corrosion inhibition for aluminum alloy in 0.1 M HCl at 298 K. UB and UC exhibited superior anticorrosion efficiency compared to UA originating from the electron-donating methoxy and ethoxy group substitutions respectively. There was found to be good correlation between molecular structure and inhibition efficiencies.
subject:
@attributes:
lang: eng
authority: uka.se
topic:
Natural Sciences
Chemical Sciences
Physical Chemistry
@attributes:
lang: swe
authority: uka.se
topic:
Naturvetenskap
Kemi
Fysikalisk kemi
@attributes:
lang: eng
authority: ltu
topic: Chemistry of Interfaces
genre: Research subject
@attributes:
lang: swe
authority: ltu
topic: Gränsytors kemi
genre: Research subject
language:
languageTerm: eng
genre:
publication/journal-article
ref
note:
Published
4
Validerad;2019;Nivå 2;2019-11-15 (johcin)
name:
@attributes:
type: personal
namePart:
Nazir
Uzma
role:
roleTerm: aut
affiliation: Department of Chemistry Quaid-i-Azam University Islamabad Pakistan
@attributes:
type: personal
namePart:
Akhter
Zareen
role:
roleTerm: aut
affiliation: Department of Chemistry Quaid-i-Azam University Islamabad Pakistan
@attributes:
type: personal
namePart:
Naveed Zafar
Ali
role:
roleTerm: aut
affiliation: National Center for Physics Quaid-i-Azam University Campus Islamabad Pakistan
@attributes:
type: personal
authority: ltu
namePart:
Shah
Faiz Ullah
1981-
role:
roleTerm: aut
affiliation:
Luleå tekniska universitet
Kemiteknik
nameIdentifier:
faisha
0000-0003-3652-7798
originInfo:
dateIssued: 2019
publisher: Royal Society of Chemistry
relatedItem:
@attributes:
type: host
titleInfo:
title: RSC Advances
identifier:
2046-2069
2046-2069
part:
detail:
@attributes:
type: volume
number: 9
@attributes:
type: issue
number: 62
extent:
start: 36455
end: 36470
physicalDescription:
form: print
typeOfResource: text