Studies on the inhibitive performance of Cinnamomum zeylanicum extracts on the corrosion of mild steel in hydrochloric acid and sulphuric acid media

Shivakumar, S. S. and Mohana, K. N. (2013) Studies on the inhibitive performance of Cinnamomum zeylanicum extracts on the corrosion of mild steel in hydrochloric acid and sulphuric acid media. Journal of Materials and Environmental Science, 4 (3). pp. 448-459. ISSN 2028-2508

[img] Text (Full Text)
Che_2013_Mohana_05.pdf - Published Version
Restricted to Registered users only

Download (754kB) | Request a copy
Official URL: https://www.jmaterenvironsci.com/Document/vol4/vol...

Abstract

The inhibitive performance of leaf extracts of cinnamoum zeylanicum (CZ) was tested as natural corrosion inhibitor for mild steel in 0.5 M HCl and 0.5 M H2SO4, respectively by using gravimetric and electrochemical techniques. The data obtained from both the methods are in good agreement with each other. Results indicate that leaf extracts of CZ is an efficient natural corrosion inhibitor in both the acid solutions. The inhibition efficiency was found to increase with increase in CZ extracts concentration in both the medium. Furthermore, the inhibition efficiency decreases with increase in temperature. Polarization measurements showed that the studied inhibitor acts as mixed inhibitor in both the acids with significant reduction of cathodic and anodic current densities. The adsorption characteristics of CZ extracts of on mild steel surface obeys Langmuir isotherm. Calculated values of free energy of adsorption and heat of adsorption indicate physical adsorption. The electrochemical impedance study further confirms the formation of an adsorbed film on the mild steel. Kinetic parameters were calculated and discussed, and SEM was used to analyze the surface adsorbed film.

Item Type: Article
Subjects: C Chemical Science > Chemistry
Divisions: Department of > Chemistry
Depositing User: Arshiya Kousar
Date Deposited: 31 Oct 2019 10:51
Last Modified: 31 Oct 2019 10:51
URI: http://eprints.uni-mysore.ac.in/id/eprint/9644

Actions (login required)

View Item View Item