The exchange current density is illustrated by the image below. To calculate the exchange current density, three essential parameters are needed and these parameters are Current Density (io), Number of Electrons (n) and Faraday’s Constant (F).
The formula for calculating exchange current density:
γred(γoxid) = io/nF
Where:
γred(γoxid) = Exhange Current Density
io = Current Density
n = Number of Electrons
F = Faraday’s Constant
Given an example;
Find the exchange current density when the current density is 8, the number of electrons is 4 and the faraday’s constant is 2.
This implies that;
io = Current Density = 8
n = Number of Electrons = 4
F = Faraday’s Constant = 2
γred(γoxid) = io/nF
γred(γoxid) = 8/(4)(2)
So, γred(γoxid) = 8/(8)
γred(γoxid) = 1
Therefore, the exchange current density is 1.
Read more: How to Calculate and Solve for Current Density | Corrosion
How to Calculate Exchange Current Density With Nickzom Calculator
Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the exchange current density.
To get the answer and workings of the exchange current density using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.
You can get this app via any of these means:
Web – https://www.nickzom.org/calculator-plus
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You can also try the demo version via https://www.nickzom.org/calculator
Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator
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Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Materials and Metallurgical under Engineering.
Now, Click on Corrosion under Materials and Metallurgical
Now, Click on Exchange Current Density under Corrosion
The screenshot below displays the page or activity to enter your values, to get the answer for the exchange current density according to the respective parameter which is the Current Density (io), Number of Electrons (n) and Faraday’s Constant (F).
Now, enter the values appropriately and accordingly for the parameters as required by the Current Density (io) is 8, Number of Electrons (n) is 4 and Faraday’s Constant (F) is 2.
Finally, Click on Calculate
As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the exchange currnet density and presents the formula, workings and steps too.
