The image above represents current density.

To compute for current density, three essential parameters are needed and these parameters are **Number of Electron Charge Present (z), Force (F) **and **Rate of Heterogeneous Reaction (V).**

The formula for calculating current density:

j = zFV

Where:

j = Current Density

z = Number of Electron Charge Present

F = Force

V = Rate of Heterogeneous Reaction

Let’s solve an example;

Find the current density when the number of electron charge present is 6, the force is 4 and the rate of heterogeneous reaction is 8.

This implies that;

z = Number of Electron Charge Present = 6

F = Force = 4

V = Rate of Heterogeneous Reaction = 8

j = zFV

j = (6) (4) (8)

j = 192

Therefore, the **current density **is **192 A/m².**

**Calculating the Number of Electron Charge Present when the Current Density, the Force and the Rate of Heterogeneous Reaction is Given.**

z = ^{j} / _{FV}

Where;

z = Number of Electron Charge Present

j = Current Density

F = Force

V = Rate of Heterogeneous Reaction

Let’s solve an example;

Find the number of electron charge present when the current density is 40, the force is 2 and the rate of heterogeneous reaction is 4.

This implies that;

j = Current Density = 40

F = Force = 2

V = Rate of Heterogeneous Reaction = 4

z = ^{j} / _{FV}

z = ^{40} / _{2 x 4}

z = ^{40} / _{8}

z = 5

Therefore, the **number of electron charge present** is** 5.**

Continue reading How to Calculate and Solve for Current Density | Corrosion