Cathodic Protection Training Course

Module 09

Cathodic protection groundbeds.
Mixed Metal Oxide anodes.

Groundbeds are designed to inject Direct Current electricity into the ground.

They are connected to the positive terminal of a transformer/rectifier or directly discharge the corrosion current from the anode metal which is designed by metalurgists to be corrosion resistant to increase the potential of the electrolyte at the anodic metal to electrolyte interface.

The ground at the centre of the groundbed is more positive that the surrounding ground. It has a higher electrical potential and will show this on a digital voltmeter.

It is good to be able to imagine a groundbed as a pile of electricity and this can be displayed by a computer using spreadsheet 3D graphics.