DuoGuard™ Hybrid Anode™ Treatment for Northern Territory Lighthouse
Applied treatment: DuoGuard™ Hybrid Anode™ Corrosion Control System
Number of Anodes: 4500 (DuoGuard D175,D500 and DuoGuard Plus Anodes )
Monitoring System: Remote Monitoring System
Project Length: May – September 2013
Client : Australian Government , Australian Maritime Safety Authority (AMSA)
Contractor : Marine and Civil Maintenance Pty Ltd
Treatment Applied: DuoGuard™ Hybrid Anode™ Corrosion Control System
Duoguard Australia Pty Ltd Products used :
DuoGuard™ Hybrid Anode™ D175 , D500 and DuoGuard Plus Anodes
DuoCrete SD Mortar
MN15 Reference Electrodes
The Cape Don Lighthouse situated on the western side of the Cobourg Peninsular, NorthernTerritory,was constructed to mark the eastern approach to Darwin, the passage between the Cobourg Peninsula and Melville Island.
The construction of the concrete lighthouse was completed in 1917. AMSA has identified that over the last 20 years the structure has progressively been showing signs of concrete reinforcement corrosion, which is believed to be the main contributing factor to the spalling and delaminating concrete.
The lighthouse was in a condition where action needed to be taken to preserve its structural integrityand heritage values.
AMSA proposed to halt the corrosion mechanism within the lighthouse and repair the damage concrete by installing a Duoguard Hybrid Anode System.
The project needed to be completed with consideration for the tropical environment of far North Australia and the short dry season available for productive construction works.
All provisions tooling, materials and access were transported via barge ex Darwin making the project an incredible logistical challenge.