In the present study undergoes the corrosion behavior of benzoin oxime against corrosion of mild steel in sea water was studied using a weight loss approach. To evaluate the effectiveness of the benzoin oxime as a corrosion in terms of corrosion rates and inhibition efficiency by weight loss method. This was done in order to determine how an inhibitor adsorbs the deterioration of mild steel dished in sea water. The mechanistic aspect of corrosion inhibition has been studied by electrochemical studies, such as potentiodynamic polarization studies and alternating current impedance spectra. Potentiodynamic polarization technique reveals that the inhibitor system functions as a mixed type of inhibitor, controlling anodic and cathodic reactions. It is noted that in presence of inhibitor, linear polarization resistance value increases, and corrosion current decreases. Electrochemical impedance studies reveal that a protective film (blanket effect) is formed on the metal surface, since in the presence of inhibitor system the charge transfer resistance value increases and double layer capacitance value decreases. This is due to adsorption of the molecules of the active ingredients of the extract on the metal surface. The protective film formed over the mild steel surface has been characterized by FTIR. The smoothness of protective film has been analyzed by SEM