Corrosion Inhibition of High Carbon Steel in Phosphoric Acid Solution by Extract of Black Tea
Dakeshwar Kumar Verma, Fahmida Khan
Advances in Research · pp. 1–9 · Published 8 Jul 2015
10.9734/AIR/2015/18723Abstract
Black tea extract was estimated as high carbon steel corrosion inhibitor in 1 M H3PO4 solution using non-electrochemical technique (Weight loss, FT-IR and SEM analysis). The maximum inhibition efficiency was found to be 93.79 at 4 g/ L. The results indicated that inhibition efficiency increases as inhibitor concentrations increase. Adsorption studies exhibited that inhibitor adsorbed on the metal surface follow Langmuir adsorption isotherm. The Gibbs free energy of adsorption (∆ Gads = -9.74 kJ mol-1) values strongly supported the physicochemical adsorption of inhibitor molecules over the high carbon steel surface. Scanning electron microscopy (SEM) was applied to study the high carbon steel surface in the presence and absence of extract. The adsorption mechanism of inhibitor molecule deposited on the metal surface was investigated by Fourier transform infrared spectroscopy.
Cited by 13
Humira Assad, Ashish Kumar · Journal of Molecular Liquids · 2021
Dakeshwar Kumar Verma, Yeestdev Dewangan, Amit Kumar Dewangan · Journal of Bio- and Tribo-Corrosion · 2020
Dakeshwar Kumar Verma, Fahmida Khan · Green Chemistry Letters and Reviews · 2016
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