Mangifera indica Leave Extracts as Organic Inhibitors on the Corrosion of Zinc Sheet in 5 M H2SO4 Solution

The inhibition efficiency and adsorption characteristics of alkaloids, flavonoids and tannins extracts of Mangifera indica leaves in controlling corrosion of Zinc sheet in 5 M hydrogentetraoxosulphate (VI) acid solution has been evaluated by gasometric method. The formulation consisting of 2 g/L of...

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Bibliographic Details
Published in:Journal of Applied Sciences and Environmental Management 2015-06, Vol.19 (1), p.145
Main Authors: UGI, B.U, EKERETE, JACKSON, IKEUBA, I.A, UWAH, I.E
Format: Article
Language:English
Subjects:
Alkaloids
H2SO4
Inhibition efficiency
Langmuir adsorption
Mangifera indica
Tannins
Zinc sheet
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Summary:The inhibition efficiency and adsorption characteristics of alkaloids, flavonoids and tannins extracts of Mangifera indica leaves in controlling corrosion of Zinc sheet in 5 M hydrogentetraoxosulphate (VI) acid solution has been evaluated by gasometric method. The formulation consisting of 2 g/L of extract offers 96.2%, 85.3% and 70.6% inhibition efficiencies (alkaloids, flavonoids and tannins respectively) at 30°C to Zinc metal immersed in 5 M hydrogentetraoxosulphate (VI) acid solution. Judging from the trend in inhibition efficiency against temperature, it can be deduced that the adsorption process was physisoption being that corrosion rate increased while inhibition efficiency decreased with temperature. Adsorption mechanism followed the Langmuir adsorption isotherm being that the correlation coefficient was found to be approximately unity i.e. 0.9237.
ISSN:1119-8362
2659-1502
1119-8362
2659-1499
DOI:10.4314/jasem.v19i1.19