ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7

Published monthly

Inhibition of copper corrosion in acidic sulphate media by eco-friendly amino acid compound

Ana T. Simonović, Marija B. Petrović, Milan B. Radovanović, Snežana M. Milić, and Milan M. Antonijević

Technical Faculty in Bor, University of Belgrade, VJ 12, P.O. Box 50, 19210, Bor, Serbia



Abstract: This investigation aimed to study a “green” non-toxic biodegradable copper corrosion inhibitor in an acidic sodium sulphate solution. The methods used in the investigation of cysteine as a copper corrosion inhibitor in an acidic sodium sulphate solution were: potentiodynamic measurements, open circuit potential measurements, and chronoamperometric measurements. Optical microscopy was used in addition to electrochemical methods. Potentiodynamic measurements show that cysteine has good inhibitory properties in an acidic medium. Polarisation curves indicate that the presence of cysteine in a sulphate solution decreases the current density and that using various cysteine concentrations results in the formation of a protective film on the surface of the electrode due to the formation of the Cu(I)-cys complex. These results are confirmed by chronoamperometric measurements. Furthermore, it is clear from microphotographs that a protective film does form on copper electrode in the presence of cysteine. The Langmuir adsorption isotherm indicates that cysteine is chemisorbed on the surface of the electrode.

Keywords: copper – cysteine – polarisation – anodic dissolution – corrosion inhibition

Full paper is available at

DOI: 10.2478/s11696-013-0458-x


Chemical Papers 68 (3) 362–371 (2014)

Tuesday, May 21, 2024

SCImago Journal Rank 2021
European Symposium on Analytical Spectrometry ESAS 2022
© 2024 Chemical Papers