The objective of this work was to study is use electrochemical techniques to determinate the growth conditions, characteristics and resistance of passive layers of stainless steel (SS): 304 austenitic, 17-4PH (precipitation hardening) and 15-5PH.Passivation of the SS was performed in 15% citric acid at temperatures of 25 and 49 °C.The corrosion kinetics was obtained using the electrochemical technique as potentiodynamic polarization (PP), in a three-electrode system.The electrolytes used were sodium chloride (5 wt.% NaCl) and sulfuric acid (1 wt.% H 2 SO 4 ).Passivation in citric acid allows obtain passive layers at temperatures of 49°C with immersion times of 30 minutes.In precipitation hardening steels, passive layers up to 360 mV in sodium chloride.Can be obtained.In sulfuric acid, there is a mechanism of passivationtranspassivation -secondary passivation, this due to the high electropositive values of potential.