Cathodic Protection


The corrosion of steel occurs due to its natural tendency to revert to its primary form of iron ore. Corrosion is an electrochemical process that involves a flow of electrons (the corrosion circuit). Cathodic protection is a means of controlling the corrosion of metal surfaces by stopping the flow of electrons. There are generally two types of cathodic protection systems – Galvanic (sacrificial) and Impressed current. Galvanic systems employ reactive metals to protect the metal surface (commonly called sacrificial anodes and are normally aluminium, zinc or magnesium). Impressed current systems use an external power source to provide the electrochemical protection.

Cathodic protection systems provide an extremely effective way of combatting corrosion on substrates that are immersed or buried in an electrolyte. It is commonly used to protect pipelines, ship’s hulls, jetties and harbours, pilings and reinforced concrete structures.

Duratec excels in the protection of corrosion of reinforcing steel in concrete – the major contributing factor in concrete degradation. Remaining at the forefront of technology, we are the only contractor in WA to have adopted and utilised a hybrid cathodic protection system (Hybrid CP). The benefits of the hybrid system over traditional methods include lower installation costs and lower ongoing maintenance costs. Contact Duratec for your next cathodic protection project.

Click on the links below to view some of our cathodic protection project experience:

St Kilda Sea Baths Hybrid Cathodic Protection Installation
Water Corporation Tank Repair

KCGM Fimiston Primary Crusher Concrete Repairs
Newmont Jundee Gold Mine Ringbeam Repairs

Newmont Jundee Crusher Repairs
Rio Tinto Dampier Salt Mooring Dolphin Repair Project
726 Hay Street Refurbishment