Benzotriazole derivatives, namely N-[1-(benzotriazol-1-yl)benzyl]aniline (BTBA) and N,N-dibenzotriazol-1-ylmethylaminocyclohexane (DBCH) were synthesized and their inhibition behaviour on brass in sodium chloride solution were investigated by weight-loss measurements, polarization, electrochemical impedance and cyclic voltammetric techniques. Results obtained revealed that these compounds exhibited good inhibition efficiency in sodium chloride solution. Polarization studies showed that the benzotriazole derivatives are mainly anodic inhibitors for brass in sodium chloride solution. They decreased the anodic reaction rate more strongly than the catholic reaction rate and rendered the open circuit potential more positive in sodium chloride solution. Accelerated leaching studies revealed that the inhibitors control the dezincification of brass. Cyclic voltammetric studies confirmed that the addition of these compounds effectively inhibit the anodic dissolution of brass. The passive film characterization was done using FT-IR spectrum. EDX analysis was used to determine the nature of the protective film formed on the metal surface.