Pourbaix diagram and current voltage curve

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The discussion centers on a chemistry project investigating the impact of various metals' electrolytic properties on iron corrosion, specifically focusing on copper, aluminum, and magnesium. The use of a Pourbaix diagram is suggested to understand the thermodynamic stability of the metals involved in the redox process and to determine corrosion susceptibility. However, it is noted that while the Pourbaix diagram provides insights into stability, it does not address corrosion rates, which are influenced by kinetics. Additionally, the conversation highlights that some metals may not corrode even when in the corrosion region of the diagram due to passivation by corrosion products. The experiment involves measuring electric current between the metals, and there is a query about constructing a current-voltage curve from this data, with a request for guidance on analysis methods.
Naima DV
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How to use and compare a Pourbaix diagram and the current-voltage curve
I have a chemistry project and my research question roughly translates to:
What is the effect of the different metals electrolytic nature on iron corrosion?
(In french: Quel est l’effet de la nature électrolytique de différents métaux (cuivre, aluminium, magnésium) sur la corrosion humide du fer? )

To answer, I think I have to use a Pourbaix diagram relating the two metals implicated in the redox process to know if one of them is going to be subjected to corrosion. I am not sure if it's possible or how to use it.

During my experiment, I'm measuring the electric electric current between the two metals. Can I build a current-voltage curve from this data? If yes, how can I analyze it?Thank you to anyone who can answer!
 
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Pourbaix diagram refers to the stability (thermodynamics) but doesn't say anything about corrosion rate (kinetics).

Plus, some metals will not corrode (despite being in the corrosion region) because they get passivated by corrosion products.
 

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