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# How to Calculate and Solve for Corrosion Penetration Rate | Corrosion

Last Updated on August 1, 2022

The corrosion penetration rate is illustrated by the image below.

To compute for corrosion penetration rate, five essential parameters are needed and these parameters are Constant (k), Weight Loss after Corrosion (W), Density of Corroding Media (ρ), Cross-sectional Area (A) and Time (t).

The formula for calculating corrosion penetration rate:

CPR = kW/ρAt

Where:

CPR = Corrosion Penetration Rate
k = Constant
W = Weight Loss after Corrosion
ρ = Density of Corroding Media
A = Cross-sectional Area
t = Time

Let’s solve an example;
Find the corrosion penetration rate when the constant is 2, the weight loss after corrosion is 4, the density of corroding media is 6, the cross-sectional area is 12 and time is 7.

This implies that;

k = Constant = 2
W = Weight Loss after Corrosion = 4
ρ = Density of Corroding Media = 6
A = Cross-sectional Area = 12
t = Time = 7

CPR = kW/ρAt
CPR = (2)(4)/(6)(12)(7)
CPR = 8/504
CPR = 0.0158

Therefore, the corrosion penetration rate is 0.0158.

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the corrosion penetration rate.

To get the answer and workings of the corrosion penetration rate using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.

You can get this app via any of these means:

You can also try the demo version via https://www.nickzom.org/calculator

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 Corrosion Penetration Rate under Corrosion

The screenshot below displays the page or activity to enter your values, to get the answer for the corrosion penetration rate according to the respective parameter which is the Constant (k), Weight Loss after Corrosion (W), Density of Corroding Media (ρ), Cross-sectional Area (A) and Time (t).

Now, enter the values appropriately and accordingly for the parameters as required by the Constant (k) is 2, Weight Loss after Corrosion (W) is 4, Density of Corroding Media (ρ) is 6, Cross-sectional Area (A) is 12 and Time (t) is 7.

Finally, Click on Calculate

As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the corrosion penetration rate and presents the formula, workings and steps too.