3.2.1. Pore resistance
If the changes can be assigned to a pore resistance model, then
the pore resistance or the low frequency response (for instance the
impedance at 1 Hz or 0.1 Hz) can be plotted in time. This is similar
to what other authors do, for instance [14]. Steady degradation in
time indicates corrosion problems in future, so the screening will
give an “expected fail” result.