2026-05-04T22:11:18Z https://www.eurjchem.com/index.php/eurjchem/oai

oai:ojs.www.eurjchem.com:article/671 2012-12-30T22:55:20Z eurjchem:ART driver

Ziziphus mauritiana leaves extracts as corrosion inhibitor for mild steel in H2SO4 and HCl solutions Shivakumar, Shivapura Subbappa Mohana, Kikkeri Narasimha Shetty Mild steel Corrosion Weight loss Polarization Ziziphus mauritiana Electrochemical impedance The inhibition performance of extracts of Ziziphus mauritiana on mild steel corrosion in 0.5 M H2SO4 and 0.5 M HCl was investigated using gravimetric, electrochemical polarization, electrochemical impedance spectroscopy and scanning electron microscopic studies. The gravimetric results indicate that Ziziphus mauritiana leaves extract exhibits good inhibition efficiency in both the acids. Furthermore, the inhibition efficiency decreases with increase in temperature. Polarization measurements showed that the studied inhibitor is mixed type in both acids with significant reduction of cathodic and anodic current densities. Electrochemical impedance spectroscopy measurements revealed that the charge transfer resistance increases with increase in the concentration of Ziziphus mauritiana extracts. Various thermodynamic parameters such as activation energy, activation enthalpy and activation entropy are evaluated and discussed. Adsorption thermodynamic parameters are also computed, and SEM was used to analyze the surface adsorbed film. Atlanta Publishing House LLC 2012-12-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://www.eurjchem.com/index.php/eurjchem/article/view/671 10.5155/eurjchem.3.4.426-432.671 European Journal of Chemistry; Vol. 3 No. 4 (2012): December 2012; 426-432 2153-2257 2153-2249 eng https://www.eurjchem.com/index.php/eurjchem/article/view/671/PDF