Journal of Applied Electrochemistry, Vol.34, No.11, 1171-1176, 2004
Effect of benzotriazole derivatives on the corrosion and dezincification of brass in neutral chloride solution
The effect of novel corrosion inhibitors, benzotriazole derivatives namely N,N-dibenzotriazol-1-ylmethylamine (DBMA), and 2-hydroxy ethyl benzotriazole (HEBTA) on the corrosion and dezincification of a 65/35 brass in 3% NaCl has been investigated by weight-loss, potentiodynamic polarization, electrochemical impedance and solution analysis techniques. Polarization studies clearly indicated that the benzotriazole derivatives behave as anodic inhibitors for brass in chloride solutions. They decrease the anodic reaction rate more strongly than the cathodic reaction rate and render the open circuit potential of brass more positive in NaCl solutions. Solution analysis revealed the decrease in dissolution of both copper and zinc in the presence of these inhibitors.
Keywords:benzotriazole derivatives;brass;dezincification;electrochemical impedance spectroscopy;NaCl