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Corrosion Protection of Carbon Steel in Saline Solution Using Plant Extracts
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| Author:
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ZAINAB W.AHMED, ENAS H.ALI, ISRAA M.RADHI
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| Abstract:
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An inhibiting influence of black tea extract in polluted sodium chloride ( 3.5% NaCl+16 ppm Na2S) on the corrosion of low carbon steel over temperature range (293-323)K was investigated by electrochemical polarization method using potentiostatic technique. The results showed that the inhibition efficiency increased with an increase in inhibitor concentration but decreased with raising the temperature. The acquired consequences specified that the examined extract has been physically adsorbed on the carbon steel surface and adheres to Langmuir adsorption isotherm. Some thermodynamic parameters (E_a ),(??G?_(ads.) ) ,(??H?_(ads.) )and(??S?_(ads.) )were calculated to elaborate the mechanism of corrosion inhibition. The polarization measurements indicated that black tea is of mixed type.
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| Keyword:
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Corrosion inhibition, carbon steel ,black tea extract, Adsorption Mechanism thermodynamic parameters.
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| EOI:
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-
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| DOI:
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https://doi.org/10.31838/ijpr/2020.SP1.305
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| Download:
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