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Indian Journal of Advances in Chemical Science Volume: 5,
Issue 4: , September 2017 |
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ISSN No.: 2320-0898 (Print);
2320-0928 (Electronic)
DOI:
10.22607/IJACS.2017.504006
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Research Article
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Inhibitive Action of Ailanthus
excelsa Roxb. Extract on the Corrosion of Mild Steel in Hydrochloric
Acid Medium |
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R. Vasantha Jothi*,
R. Saratha, D. Senthil Vadivu |
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ABSTRACT |
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The inhibitive action of Ailanthus
excelsa Roxb. (AEL) on mild steel (MS) corrosion in 1.0 M
hydrochloric acid was studied using the chemical method. The effect
of temperature on the corrosion behavior of MS in 1.0M HCl with the
addition of plant extracts was studied in the temperature range of
308-333 ± 1 K, and inhibition efficiencies up to 98% for AEL were
obtained. Adsorption of AEL on the MS surface was found to obey
Langmuir adsorption isotherm. Free energy of adsorption (ΔGads)
calculated from the temperature studies revealed the possibility of
both physisorption and chemisorption. Scanning electron microscopy
images confirm the formation of protective film on the metal surface
by adsorption of inhibitor which offers protection against acid
attack.
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Key words: Ailanthus
excelsa Roxb, Corrosion inhibitor, Mild steel, Weight loss method,
Adsorption isotherm, Scanning electron microscopy. |
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[Download Full Article
PDF] |
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