Understanding Corrosion in Water Pipelines: A Guide for Pipeline Designers


Anodic Current

Last updated: February 7, 2017

What Does Anodic Current Mean?

An anodic current is a type of partial current that refers to the electrons entering an electrode in an electrode reaction. Anodic current is typically caused by the oxidation of a material in an electrolytic solution. The anodic current is used to help determine the rate of corrosion.


Corrosionpedia Explains Anodic Current

Anodic current is only a portion of the total current. To understand the full current of an electrode reaction, it is necessary to take into account the cathodic current, which is the flow of electrons leaving an electrode.

The anodic (or cathodic) current is used to help determine the rate of corrosion. Faraday’s law states that when the anodic currents are known, it is possible to determine the rate of material loss due to corrosion. A Tafel slope can be used to determine what the corrosion currents are. By using both Faraday’s law equation and the Tafel slope analysis, it is possible to determine with what materials and how fast corrosion is expected to occur.


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