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

Copper corrosion behaviour in acidic sulphate media in the presence of 5-methyl-lH-benzotriazole and 5-chloro-lH-benzotriazole

Zaklina Z Tasic and Milan M Antonijevic

^aDepartment for Technological Engineering, Technical Faculty in Bor, University of Belgrade, VJ 12, P.O. Box 50, 19210 Bor, Serbia

E-mail: mantonijevic@tf.bor.ac.rs

Abstract: The influence of 1H-benzotriazole, 5-methyl-1H-benzotriazole and 5-chloro-1H-benzotriazole on copper corrosion in an acidic sulphate medium was studied, as well as the influence of chloride ions on the corrosion behaviour of copper. The methods used were potentiodynamic measurements, open circuit potential and mass loss. The results show that the examined compounds possess good inhibitory properties in an acidic medium. The potentiodynamic polarisation results indicate that the degree of copper protection against corrosion depends on the concentration of Cl⁻ ions and the concentration of organic compounds. The adsorption of these compounds on the copper surface follows the Langmuir adsorption isotherm.

Keywords: 5-methyl-1H-benzotriazole – 5-chloro-1H-benzotriazole – surface analysis – chloride ions – corrosion

Full paper is available at www.springerlink.com.

DOI: 10.1515/chempap-2015-0248

Chemical Papers 70 (5) 620–634 (2016)