Cathodic Protection

Water Engineering Technologies in-house expertise can provide a service to maintain your existing Cathodic Protection or to install a new system. Our experience across the state ensures we provide a service which is efficient and innovative ensuring we meet your needs.

Services provided for improvements;

  • Asset life monitoring
  • Condition/thickness assessments
  • Cathodic protection system upgrades
  • Sacrificial and impressed current anode replacement (ground and water)
  • Interference testing.

Cathodic Protection (CP) systems are used to protect buried and immersed coated mild steel assets state wide in South Australia from external corrosion from corrosive environments (e.g. soils, water, seawater) and stray current corrosion from DC traction systems i.e. trams. Cathodic Protection is an electrochemical process applied to buried or immersed metallic assets to protect them from corrosion, prevent further deterioration, avoid bursts and extend their economic life.

The Cathodic Protection state wide asset management plan objective is to stop external corrosion of buried assets (mainly buried coated mild steel water pipelines) by either retrofitting cathodic protection systems to existing pipelines or upgrading/ rehabilitating existing systems to maintain and improve protection to extend the life of the buried assets.

There have been cases of buried assets that have not been adequately protected in the past which has led to failure due to corrosive soil. The mean expected life of coated mild steel concrete lined (MSCL) pipes is 110 years.

Cathodic Protection is similar to the exterior paint on your house; it protects the exterior of the house from the elements. If you keep the protection up on your house exterior then it will remain in good condition. This practice applies to Cathodic Protection which provides additional benefit in that it can give an indication on how the buried asset is going in its environment and is why SA Water uses this treatment on its buried metallic assets to ensure their longevity.