  Electrochemical Impedance Spectroscopy (EIS) is an experimental technique
largely used in electrochemistry and corrosion studies. However, almost all
published papers have just measured the EIS at the corrosion potential,
especially for corrosion purposes. This fact limits the capability of the
technique. In this paper, a Scilab software was developed which allows the
visualization of multiple EIS diagrams regarding the potential, exposure time
or experiment run. This procedure was applied to austenitic stainless steels in
two electrolytes from cathodic to anodic potentials. The EIS maps with two- or
three- dimensions were very useful to depict the evolution of the surface with
respect to the large range of applied potential. Some results are shown to
highlight the usefulness of this approach as a complementary technique to the
DC test performed at a given potential range.
