Pourbaix diagram and current voltage curve

AI Thread Summary
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
Messages
1
Reaction score
0
TL;DR Summary
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!
 
Chemistry news on Phys.org
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.
 

Thread 'Humidity of a saturated NaCl solution with anticaking additive'

I want to test a humidity sensor with one or more saturated salt solutions. The table salt that I have on hand contains one of two anticaking agents, calcium silicate or sodium aluminosilicate. Will the presence of either of these additives (or iodine for that matter) significantly affect the equilibrium humidity? I searched and all the how-to-do-it guides did not address this question. One research paper I found reported that at 1.5% w/w calcium silicate increased the deliquescent point by...
View full post »

Similar threads

Corrosion and galvanic corrosion (Basic level)
Replies
9
Views
3K
Chemistry How Does Electrolyte Type Influence Voltage in Galvanic Cells?
Replies
6
Views
3K
IV curve for voltage across shunt for probe current (Helimak experiment)
Replies
1
Views
1K
How Can Torque Be Increased in an Electric Motor?
Replies
3
Views
2K
Mathematica This Week's Finds in Mathematical Physics (Week 231)
Replies
5
Views
3K
Mathematica This Week's Finds in Mathematical Physics (Week 231)
Replies
5
Views
3K

Hot Threads

Recent Insights

Back
Top