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dc.contributor.authorPalaniappan, N
dc.contributor.authorCole, I
dc.contributor.authorCaballero-Briones, F
dc.contributor.authorManickam, S
dc.contributor.authorJustin Thomas, KR
dc.contributor.authorSantos, D
dc.date.accessioned2020-06-03T06:37:56Z
dc.date.available2020-06-03T06:37:56Z
dc.date.issued2020
dc.identifier.issn2046-2069
dc.identifier.doi10.1039/c9ra08971c
dc.identifier.urihttp://hdl.handle.net/10072/394361
dc.description.abstractCatharanthus roseus (Apocynaceae family) extract is rich in organic phytochemicals such as alkaloids, polyphenolic compounds, and flavonoids. It contains several functional entities such as fused heterocycles, and hydroxyl and carbonyl groups, which could be useful for corrosion inhibition of mild steel in NaCl environments. In the present work, ultrasonic energy was used to obtain the ethanolic extracts of root and stem which were then tested as corrosion inhibitors for mild steel in the presence of 3.5% NaCl. The corrosion inhibition process was studied by UV-visible spectroscopy, Fourier transform infrared spectroscopy, atomic force microscopy, weight loss, and electrochemical methods. After immersing in the corrosive medium, the microstructures of mild steel were investigated by scanning electron microscopy, X-ray diffraction, and ellipsometry. The extract of C. roseus showed excellent adsorption on mild steel surface as confirmed by DFT calculations. The results indicate that the extract of C. roseus acts as a mixed type corrosion inhibitor, where the stem extract is the most efficient inhibitor in 3.5% NaCl solution possibly due to the higher active area of stem phytochemicals.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherRoyal Society of Chemistry (RSC)
dc.relation.ispartofpagefrom5399
dc.relation.ispartofpageto5411
dc.relation.ispartofissue9
dc.relation.ispartofjournalRSC Advances
dc.relation.ispartofvolume10
dc.subject.fieldofresearchChemical sciences
dc.subject.fieldofresearchcode34
dc.titleExperimental and DFT studies on the ultrasonic energy-assisted extraction of the phytochemicals of: Catharanthus roseus as green corrosion inhibitors for mild steel in NaCl medium
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationPalaniappan, N; Cole, I; Caballero-Briones, F; Manickam, S; Justin Thomas, KR; Santos, D, Experimental and DFT studies on the ultrasonic energy-assisted extraction of the phytochemicals of: Catharanthus roseus as green corrosion inhibitors for mild steel in NaCl medium, RSC Advances, 2020, 10 (9), pp. 5399-5411
dcterms.licensehttps://creativecommons.org/licenses/by/4.0/
dc.date.updated2020-06-03T06:35:55Z
dc.description.versionVersion of Record (VoR)
gro.rights.copyright© The Author(s) 2020. This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorCole, Ivan


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