The electropolishing process of metals allows improving the superficial state of the biomedical devices made with stainless steel. In this work, the evaluation with electrochemical impedance spectroscopy (EIS) of the superficial condition of 316L stainless steel made by an electropolishing process was evaluated. The obtained data from the diagrams of EIS has allowed determining the effect of temperatura and time of electropolishing on the increase or decrease of the electrochemical resistance by comparing with the materials without electropolishing process. Also, the capacitive and resistive behaviors were identified by defects in the surface, and the possible presences of stable passive layers were studied.