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Licensed Unlicensed Requires Authentication Published by De Gruyter August 30, 2019

Corrosion inhibition of steel in a sodium chloride solution by natural honey

Veselinka Grudić, Sanja Martinez, Bojana Knežević and Ivana Bošković
From the journal Materials Testing

Abstract

This paper studies the corrosion inhibition of carbon steel in a 0.51 mol × dm−3 sodium chloride solution in the presence of honey. The tests were carried out using the potentiodynamic polarization method, scanning electronic spectroscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and Fourier-transform infrared spectroscopy (FTIR). Electrochemical parameters which indicate the corrosion behavior of the steel in the sodium chloride solution in the absence and in presence of honey were calculated based on the experimental results. It was shown that honey acts as a mixed corrosion inhibitor whose efficiency increases with an increasing concentration. The maximum efficiency of inhibition (77.68 %) was maintained through a 1200 ppm concentration of honey. The adsorption of the tested inhibitor is described by Langmuir's isotherm, and the calculated value of free adsorption energy indicates the physical adsorption of the organic components of honey on the steel surface. The results of the SEM, FTIR and EDX analysis show that the honey covers the steel surface and prevents the influence of the aggressive medium.


Correspondence Address, XAssoc. Prof. Dr. Ivana Bošković, Faculty of Metallurgy and Technology, Cetinjski put Street, University of Montenegro, 81000 Podgorica, Montenegro, E-mail:

Dr. Veselinka Grudić, born in 1972, is Associate Professor at the Faculty of Metallurgy and Technology, Podgorica, Montenegro with an expertise in electrochemistry. She studied Metallurgy and Technology at the same Faculty from 1990 to 1995, finishing her postgraduate studies at the Faculty of Physical Chemistry, Belgrade in 1999 and receiving her PhD degree in 2004 at the Faculty of Physical Chemistry, Belgrade, Serbia.

Dr. Sanja Martinez is a Full Professor at the Faculty of Chemical Engineering and Technology, University of Zagreb, Croatia, with an expertise in Chemical Engineering, Analytical Chemistry, Biochemistry.

Bojana Knežević, born in 1993, has a Master's degree in Engineering. She studied at the Faculty of Metallurgy and Technology, Podgorica, Montenegro from 2012 to 2016 and finished her postgraduate studies in 2017 at the Faculty of Metallurgy and Technology, Podgorica, Montenegro.

Ivana Bošković, born in 1971, is Associate Professor at the Faculty of Metallurgy and Technology, Podgorica, Montenegro with an expertise in physical chemistry. She studied Chemical Technology at the same Faculty from 1990 to 1995 and completed her postgraduate studies at the Faculty of Physical Chemistry, Belgrade, in 1999 and received her PhD degree in 2006 at the Faculty of Physical Chemistry, Belgrade, Serbia,


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Published Online: 2019-08-30
Published in Print: 2019-08-30

© 2019, Carl Hanser Verlag, München