The Influence of Benzotriazole on the Electrochemical Behavior of the AgCu50 Alloy in a Chloride Medium

The effect of benzotriazole (BTA) on the electrochemical behavior of the alloy AgCu50 (50 wt % Ag + 50 wt % Cu) in 0.5 M NaCl solution was investigated. Electrochemical behavior of pure copper, pure silver, as well as AgCu50 alloy, were studied under the same conditions for comparative analysis. The...

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Published in:Protection of metals and physical chemistry of surfaces 2022-08, Vol.58 (4), p.811-821
Main Authors: Zdravković, Milica, Grekulović, Vesna, Vujasinović, Mirjana Rajčić, Mitovski, Aleksandra, Štrbac, Nada, Stamenković, Uroš
Format: Article
Language:English
Subjects:
Anodic polarization
Benzotriazole
Characterization and Evaluation of Materials
Chemistry and Materials Science
Copper base alloys
Corrosion and Coatings
Corrosion products
Electrochemical analysis
Electrode polarization
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Investigations
Materials Science
Metallic Materials
Open circuit voltage
Physicochemical Problems of Materials Protection
Silver base alloys
Tribology
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Summary:The effect of benzotriazole (BTA) on the electrochemical behavior of the alloy AgCu50 (50 wt % Ag + 50 wt % Cu) in 0.5 M NaCl solution was investigated. Electrochemical behavior of pure copper, pure silver, as well as AgCu50 alloy, were studied under the same conditions for comparative analysis. The effect was studied by measuring the open circuit potentials as well as by using anodic potentiodynamic polarization and potentiostatic method. The value of open circuit potential for the alloy AgCu50 is between the potentials for pure silver and pure copper. SEM and EDS analyses were performed after potentiostatic treatment. Five current peaks were detected on the anodic polarization curve for alloy in 0.5 M NaCl. The addition of BTA in concentrations above 0.005 M decreases the current in investigated potential range and almost completely passivates the AgCu50 alloy. The results of potentiostatic investigations indicate that the mechanism of inhibiting effect depends on the benzotriazole concentration in electrolyte. Better effect of inhibition is achieved with the higher concentration of BTA. The results obtained by SEM and EDS analyzes show that in the presence of BTA amount of corrosion products decreases.
ISSN:2070-2051
2070-206X
DOI:10.1134/S2070205122040268