Corrosion Inhibition and Adsorption Properties of Prosopis juliflora Leaves Extract for the Corrosion of Mild Steel in 1M HCl Solution
Mustapha Balarabe Idris, Khalid Da’u Khalid, Naziru Alhassan Muhammad, Ahmad Bala
Journal of Scientific Research and Reports · pp. 1–7 · Published 24 Feb 2016
10.9734/JSRR/2016/23101Abstract
Corrosion of materials such as mild steel causes big losses in the economy of many countries due to the huge amount of funds needed in order to minimize it. The aim of this paper is to investigate the effect of Prosopis juliflora leaves extract as an effective and eco-friendly source of corrosion inhibitor for the corrosion inhibition of mild steel in 1M HCl using weight-loss method. The inhibition efficiency in the present study increases with the increase of extract concentration, but decreased with increase in temperature. The adsorption of the Prosopis juliflora extract on mild steel in 1M HCl surface was found to obey Langmuir adsorption isotherm model with R2 values very close to unity. Negative values of free energy of adsorption and activation energy ˂80 Kj/mol implied spontaneous process with physical adsorption mechanism.
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