Stainless steel is one of the most important materials, because its composition provides it corrosion resistance property, so this material it is known like a multipropose material. That is why A304 stainless steel is the most useful steel in chemical industry. At present, few authors have been interested in the study of corrosion with purpose of using it as a method of obtaining electrochemically active surfaces for technological purposes. In the present work, the results of the study of the energetic conditions for controlled pit production in stainless steel A304 are shown. The study was carried out using corrosive medium rich in chlorides like solution type NACE TM 0177. A flat three-electrode electrochemical cell was assembled using A304 stainless steel samples as working electrodes, saturated calomel (SCE) as reference electrode and a graphite bar as auxiliary electrode. This cell was coupled to a potentiostat-galvanostat GAMRY EIS 300 to perform Potentiodynamic Polarization in from OCP to 0.5 V. From the obtained results there were selected four different potentials for chronoamperometric transients study, which were performed using the electrochemical flat cell coupled to a potenctiostat-galvanostat and Zero Resistance Ammeter ACM Gill AC, at four different time laps. The obtained surface after the experiments was characterized with Scanning Electron Microscopy (SEM) to analyze the pits characteristics morphology and size.