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.**

Continue reading How to Calculate and Solve for Corrosion Penetration Rate | Corrosion