Cathodic Protection Training Course

Module 9

Groundbed design.

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 base metal which is sacrificed to protect the subject metal.
In either case 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 Excell.

  • Sacrificial anodes.

  • Impressed current anodes, materials conductors, volts drops, header cables, ring mains, insulation, jointing systems.

  • Groundbed potential profile plotting.

  • Closeness of anodes.

  • Horizontal, vertical, borehole and disused-used oil-wells.

  • Scrap metal groundbeds.

  • Practical bench experiments relating to groundbeds.

  • Field work with survey to locate a groundbed and plot it's profile.

  • Report and on-line real-time discussion.