##### Asked by: Linus Schmedtkord

asked in category: General Last Updated: 14th March, 2020# How does Tafel plot calculate corrosion rate?

**Tafel plots are**described by the

**Tafel equation**: η = overvoltage, the difference between the potential of the specimen and the

**corrosion**potential.

**Tafel**constants

**are**used to

**calculate corrosion rates**from polarization resistance data (see Section II).

Moreover, how do you calculate corrosion rate?

**In order to calculate the rate of corrosion, the following information must be collected:**

- Weight loss (the decrease in metal weight during the reference time period)
- Density (density of the metal)
- Area (total initial surface area of the metal piece)
- Time (the length of the reference time period)

Secondly, how do you get the Tafel slope?

- take one LSV curve at a particular rotation rate.
- convert the current to current density and the take absolute value of the current density data.
- take log value of abs current density data.
- plot the log value as x axis and potential as y axis.

Besides, how do you calculate thickness from corrosion?

1. Condition of a **Corroded** Pressure Vessel. **Corrosion rate** for thinning damage mechanisms is determined by the difference between two **thickness** readings divided by the time interval between the readings. The determination of **corrosion rate** may include **thickness** data collected at more than two different times.

What is MPY in corrosion rate?

Mils per Year – **MPY** – **Corrosion Rate** Mils per year or **MPY** is used to give the **corrosion rate** in a pipe, a pipe system or other metallic surfaces. It is used to calculate the material loss or weight loss of a metal surfaces.