Open AccessInfluence of 5-Chlorobenzotriazole on Inhibition of Copper Corrosion in Acid Rain Solution
Author(s) -
Ana T. Simonović,
Žaklina Z. Tasić,
Milan B. Radovanović,
Marija B. Petrović Mihajlović,
Milan M. Antonijević
Publication year - 2020
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.0c00553
Subject(s) - copper , adsorption , electrochemistry , chemistry , corrosion , polarization (electrochemistry) , langmuir adsorption model , scanning electron microscope , ion , cathodic protection , corrosion inhibitor , inorganic chemistry , anode , erosion corrosion of copper water tubes , nuclear chemistry , electrode , materials science , organic chemistry , composite material
This paper aims to examine the efficiency of 5-chlorobenzotriazole (5Cl-BTA) as a copper corrosion inhibitor in acidic rain solutions with a pH value of 2.42 by the electrochemical polarization method. 5-Chlorobenzotriazole acts similar to a mixed type inhibitor, according to the potentiodynamic polarization measurements. Results obtained in this research suggest that 5Cl-BTA is a good inhibitor; it decreases anodic and cathodic reaction rates, and the highest inhibition efficiency was 91.2%. The inhibitory effect of 5-chlorobenzotriazole is explained by the formation of the layer on the copper surface. Stability of the protective layer increased with inhibitor concentration. Scanning electron microscopy and energy-dispersive analysis of X-rays analysis confirmed that on the electrode surface, a protective layer was formed. Adsorption of 5Cl-BTA obeys the Langmuir adsorption isotherm. 5Cl-BTA showed good inhibitory characteristics even when the Cl - ions were present in examined solutions.
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