The Icorr can be generated from the AutoLab Potentiodynamic measuring device directly. I think it is easy from there.

Tausif Alam

1. Plot a graph

Plot the potential (V) and current density (j) on the axes.

This usually looks like a logarithmic relationship.

2. Calculate the logarithm of the current density

For the y-axis, use log(j), where j is the current density.

3. Plot points on the graph

Mark the experimental data for reversible and irreversible processes.

4. Select linear regions

Find the linear regions of the graph (linear relationship in the forward and backward regions).

5. Plot lines

Draw lines corresponding to the linear regions and extend them to align them on the y-axis

. 6. Find the intersection points

Find the point where these lines intersect; this is the value of Icor.

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Check this out:

https://www.gamry.com/application-notes/corrosion-coatings/basics-of-electrochemical-corrosion-measurements/