The image above represents chemical breakthrough time. Two essential parameters are needed to calculate chemical breakthrough time: thickness (l) and diffusion coefficient (D).
The formula for calculating chemical breakthrough time:
tb = l²/6D
Where:
tb = Chemical Breakthrough Time
l = Thickness
D = Diffusion Coefficient
Let’s solve an example;
Find the chemical breakthrough time when the thickness is 14 and the diffusion coefficient is 7.
This implies that;
l = Thickness = 14
D = Diffusion Coefficient = 7
tb = l² / 6D
tb = 14²/6(7)
So, tb = 196/42
tb = 4.66
Therefore, the chemical breakthrough time is 4.66 s.
Calculating the Thickness when the Chemical Breakthrough Time and the Diffusion Coefficient are Given
l = √tb x 6D
Where;
l = Thickness
tb = Chemical Breakthrough Time
D = Diffusion Coefficient
Let’s solve an example;
Find the thickness when the chemical breakthrough time is 5 and the diffusion coefficient is 20.
This implies that;
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tb = Chemical Breakthrough Time = 5
D = Diffusion Coefficient = 20
l = √tb x 6D
l = √5 x 6(20)
So, l = √5 x 120
l = √600
l = 24.49
Therefore, the thickness is 24.49.
Read more:Â How to Calculate and Solve for Exposure Rate of Chemicals | Material Selection
Calculating the Diffusion Coefficient when the Chemical Breakthrough Time and the Thickness are Given
D = l2 / tb x 6
Where;
D = Diffusion Coefficient
tb = Chemical Breakthrough Time
l = Thickness
Let’s solve an example;
Find the diffusion coefficient when the chemical breakthrough time is 2 and the thickness is 8.
This implies that;
tb = Chemical Breakthrough Time = 2
l = Thickness = 8
D = l2 / tb x 6
That is, D = 82 / 2 x 6
D = 64 / 12
D = 5.33
Therefore, the diffusion coefficient is 5.33.
How to Calculate Chemical Breakthrough Time With Nickzom Calculator
Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the chemical breakthrough time.
To get the answer and workings of the chemical breakthrough time 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
To get access to the professional version via web, you need to register and subscribe for NGN 2,000 per annum to have utter access to all functionalities.
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
Android (Free) – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator
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 Material Selection under Materials and Metallurgical
Now, Click on Chemical Breakthrough Time under Material Selection
The screenshot below displays the page or activity to enter your values, to get the answer for the chemical breakthrough time according to the respective parameter which is the Thickness (l) and Diffusion Coefficient (D).
Now, enter the values appropriately and accordingly for the parameters as required by the Thickness (l) is 14 and Diffusion Coefficient (D) is 7.
Finally, Click on Calculate
As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the chemical breakthrough time and presents the formula, workings and steps too.
