Issue 67, 2015

Anticorrosive assay-guided isolation of active phytoconstituents from Anthemis pseudocotula extracts and a detailed study of their effects on the corrosion of mild steel in acidic media

Abstract

In this study, anticorrosive properties of various extracts (methanolic, aqueous methanolic and water extracts) of Anthemis pseudocotula for mild steel in 1.0 M HCl media is screened for the first time. Among the various tested extracts, the methanolic extract of A. pseudocotula shows the highest corrosion inhibition activity. Anticorrosive assay-guided isolation of this methanolic extract results in the isolation of a highly potent anticorrosive compound, APB (luteolin-7-O-β-D-glucoside). The anticorrosive effects of APB on mild steel in 1.0 M HCl media were evaluated in detail using gravimetric, Tafel plots, linear polarization, electrochemical impedance spectroscopy and SEM and EDS techniques. Tafel plots reveal that APB acts as a mixed-type inhibitor. The adsorption behaviour of this green inhibitor on the mild-steel surface obeys the Langmuir adsorption isotherm. A surface morphology study through SEM and EDS analysis displays a noteworthy upgraded surface morphology of the mild steel plate in the presence of the green inhibitor in 1.0 M HCl media. The results obtained from electrochemical tests and weight loss measurements are in good agreement which shows excellent inhibition efficiency for the natural compound APB.

Graphical abstract: Anticorrosive assay-guided isolation of active phytoconstituents from Anthemis pseudocotula extracts and a detailed study of their effects on the corrosion of mild steel in acidic media

Supplementary files

Article information

Article type
Paper
Submitted
16 May 2015
Accepted
12 Jun 2015
First published
12 Jun 2015

RSC Adv., 2015,5, 54283-54292

Author version available

Anticorrosive assay-guided isolation of active phytoconstituents from Anthemis pseudocotula extracts and a detailed study of their effects on the corrosion of mild steel in acidic media

H. Z. Alkhathlan, M. Khan, M. M. S. Abdullah, A. M. AlMayouf, A. Y. Badjah-Hadj-Ahmed, Z. A. AlOthman and A. A. Mousa, RSC Adv., 2015, 5, 54283 DOI: 10.1039/C5RA09154C

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