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CORROSION INHIBITION STUDY OF NELUMBO NUCIFERA PETAL EXTRACT AS GREEN INHIBITOR FOR MILD STEEL IN HYDROCHLORIC ACID
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Author(s):
AJAY. N. PATEL, G. M. MALIK
Vol - 9, Issue- 4 ,
Page(s) : 129 - 138
(2018 )
DOI : https://doi.org/10.32804/CASIRJ
Abstract
Abstract :
The inhibition effect of Nelumbo nucifera petal on corrosion of mild steel in hydrochloric acid using weight loss measurement and electrochemical techniques has been reported in this study. The inhibition efficiency of Nelumbo nucifera petal was found to vary with concentration, temperature and immersion time. Using method of weight loss, effect of temperature, polarization, Electrochemical Impedance Spectroscopic (EIS). The inhibition efficiency(I.E.) increases with inhibitor concentration. The adsorption study of these compounds of mild steel surface found to obey Temkin’s adsorption isotherm. The value of free energy of adsorption ( G0ads ), heat of adsorption (Qads), energy of activation (Ea), enthalpy of adsorption ( H0ads) and entropy of adsorption ( S0ads) were calculated.
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