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Journal of Materials Engineering and Performance

Erschienen in:

01.04.2013

Indole Alkaloids of Alstonia angustifolia var. latifolia as Green Inhibitor for Mild Steel Corrosion in 1 M HCl Media

verfasst von: Pandian Bothi Raja, Ahmad Kaleem Qureshi, Afidah Abdul Rahim, Khalijah Awang, Mat Ropi Mukhtar, Hasnah Osman

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 4/2013

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Abstract

The inhibition effect of mild steel (MS) corrosion in 1 M HCl was studied by the addition of indole alkaloids (crude) isolated from Alstonia angustifolia var. latifolia (A. latifolia) leaves at 303 K. Potentiodynamic polarization, impedance spectroscopy, scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) analyses were used for this study. Results show that the isolated alkaloid extract of A. latifolia is a good inhibitor and exhibited maximum inhibition efficiency (above 80%) at concentrations between 3 and 5 mg/L. Polarization measurements indicated that the inhibitor does not alter the mechanism of either anodic or cathodic reactions and acted as mixed-type inhibitor. The inhibition efficiencies of both electrochemical techniques are found to be in good agreement and adsorption of inhibitor follows Langmuir isotherm. Adsorption of inhibitor over metal surface was well supported by the SEM studies, while FTIR studies evidenced the presence of indole alkaloids as green inhibitor that reduces the rate of corrosion.

Vorheriger Artikel A Repeated Impact Method and Instrument to Evaluate the Impact Fatigue Property of Drillpipe

Nächster Artikel Fatigue Properties of Borosilicate Glass Coated with Two-Layered Ceramic Thin Films

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Titel: Indole Alkaloids of Alstonia angustifolia var. latifolia as Green Inhibitor for Mild Steel Corrosion in 1 M HCl Media
verfasst von: Pandian Bothi Raja
Ahmad Kaleem Qureshi
Afidah Abdul Rahim
Khalijah Awang
Mat Ropi Mukhtar
Hasnah Osman
Publikationsdatum: 01.04.2013
Verlag: Springer US
Erschienen in: Journal of Materials Engineering and Performance / Ausgabe 4/2013
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-012-0347-4

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