About this webinar

Cathodic protection (CP), when properly applied, is an effective technique to minimise the natural corrosion process that occurs on pipelines, tanks, and other buried metallic structures. To maintain effective CP coverage with minimal current demand, the structure must be well-isolated from earth for DC current flow.

However, these structures require electrical earthing for both personnel safety and protection of the structure from damage due to over-voltage conditions. These earthing bonds require the CP system to protect significantly more material surface area for which it was not designed. As a result, it is often difficult to maintain adequate CP potentials on the structure that is to be protected.

A practical and widely accepted solution is to install DC decoupling devices in series with the bonding connections between the cathodically-protected structure and the earthing systems. Decouplers are designed to block CP current while allowing steady state AC, AC faults and lightning to pass freely. This prevents CP current from passing through the earthing systems and so minimizes the amount of CP current required to protect the pipeline.

Speaker

Phil Eggen

Market Segment Manager

Moderator

Kody Kindle

Account Manager