Polypyrrole films have been successfully synthesized on zinc surface in absence and presence of sodium bis(2-ethylhexyl) sulfosuccinate and sodium dodecylbenzo-sulphonate as dopants. The synthesis was achieved by galvanostatic method. The electrochemical behaviour of doped-polypyrrole films was investigated by electrochemical impedance spectroscopy and polarization studies. The films were characterized by scanning electron microscopy. Considering the surfactant anions entrapment inside the polymer matrix, the obtained results showed that the dopant concentration plays an important role in the response of the obtained coatings which proved to inhibit the corrosion of zinc substrate at anodic polarization in 0.1M NaCl.