V. Grekulović, M. Rajčić Vujasinović, A. Mitovski

Electrochemical behavior of AgCu50 in alkaline media in the presence of chlorides and 2-mercaptobenzothiazole

J. Min. Metall. Sect. B-Metall. 53 (3) B (2017) 349-356. DOI:10.2298/JMMB170623044G
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Electrochemical behavior of an alloy AgCu50, pure copper, and pure silver, respectively, was investigated by measuring the open circuit potentials using anodic potentiodynamic polarization and potentiostatic method in 0.1 moldm-3 NaOH + 0.02 moldm-3 NaCl solution, without and with adding 2-mercaptobenzothiazole in various concentrations (0.00001 – 0.001 moldm-3). Anodic polarization curves for AgCu50 alloy, showed four current peaks. Potentiostatic curves showed that values of the stationary current densities drop down with the increase of 2-mercaptobenzothiazole concentration in the electrolyte. The electrode surface was analyzed by optical microscopy after the potentiostatic oxidation. Micrographs confirmed that 2-mercaptobenzothiazole has got the inhibitory effect by forming the film of CuMBT and AgMBT which protect the electrode surface from corrosion.
Keywords: Silver; Copper; Alloy AgCu50; Potentiodynamic polarization; 2-mercaptobenzothiazole

Correspondence Address:
V. Grekulović,
University of Belgrade,
Technical Faculty in Bor, Bor, Serbia

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