Electrochemical Properties of Poly (2-Mercaptobenzimidazole) Films Prepared in Methanol Alkaline Solvent on Copper-Zinc Alloy
Science Direct Working Paper No S1574-0331(04)70339-2
12 Pages Posted: 31 May 2017 Last revised: 16 Dec 2017
Date Written: September 2000
The kinetic of electropolymerization of the 2-mercaptobenzimidazole (2-MBI) on Brass substrate in methanol alkaline solution was investigated using cyclic polarization, chronoamperometry and electrochemical impedance techniques. The polymeric film was prepared by successive cycling potential of Cu-Zn electrode between 0.2V and 2.4V. At the second cycling, the oxidation peak of monomer disappears indicating the formation of insulating film. We have also shown that monomer oxidation reaction is essentially irreversible and controlled by a diffusion process. The protective effect of the film formed on brass, has been studied in 3% NaCl solution. The results showed an important inhibition efficiency was very high in the order of 96% for 4h of testing time.
Keywords: 2-mercaptobenzimidazole, electropolymerization, isolating film, inhibition of corrosion, NaCl 3%
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