Intergranular corrosion of copper in the presence of benzotriazole

Adsorption of cobalt (II) 5,10,15,20-tetrakis(2-aminophenyl)-porphyrin onto copper substrates: Characterization and impedance studies for corrosion inhibition

“…1) The porphyrin molecule has a benzotriazole like structure, which forms a complex with copper [5,[36][37]. The mechanism of the interaction of the porphyrin on the copper surface can be given by:…”

A review of the effects of benzotriazole on the corrosion of copper and copper alloys in clean and polluted environments

“…In acidic solutions, it was reported that the decrease in the maximum quartz resonator admittance associated with the increased resistance of the CuBTA film can be correlated with the reduced inhibition effectiveness of the formed protective film. In another study, bulk acoustic wave (BAW) technique was used to study the structure and real-time growth behavior of the Cu-BTA complex in sodium chloride solutions containing low concentration of benzotriazole [43]. It was shown that different growth kinetics of the film resulted in different inhibition abilities.…”

Effect of sulfide pollution on the stability of the protective film of benzotriazole on copper

“…This passive region ends at the break down potential, E b , beyond which the current increases rapidly as the potential becomes more anodic. The rapid increase in current above E b is caused by localized corrosion as a result of the breakdown of the protective film [38]. As the concentration of BTAH increases, the breakdown potential, E b , becomes more positive and the current in the passive region decreases indicating that the film becomes more protective.…”

“…While the two currents in the presence of 10 À2 M BTAH are fairly close, the steady state current in the presence of 10 À3 M BTAH (50 mA cm À2 ) is about fourfold greater than the current obtained from the potentiodynamic polarization curve (12 mA cm À2 ). This might be attributed to the tendency of copper to undergo localized corrosion in the presence of low concentrations of BTAH [38].…”