Cathodic Protection Systems
Corrosion and the resulting deterioration it causes can dramatically reduce the service life of vital infrastructure. Corrosion is a major cost to the economy, environment and if left unchecked can become a serious safety risk.
CCI uses electrochemical protection systems (EPS) to provide corrosion protection for many types of structures across a range of industries including the following:
* Cathodic protection (CP) for existing concrete structures, including bridges, wharves and buildings;
* Cathodic protection for steel structures, including reservoirs, pipelines and wharf piles
Introduction to Cathodic Protection
Galvanic or sacrificial anodes are designed with a more negative electrochemical potential than the metal of the structure.
The voltage potential of the steel surface is polarised (pushed) more negative until the surface of the structure has a uniform voltage potential and the driving force for the corrosion reaction is halted. The sacrificial anode continues to corrode (sacrifice), which consumes the anode material until it requires replacement. The polarisation is caused by the current flow from the anode to the cathode. The driving force for the CP current flow is the difference in electrochemical voltage potential between the anode and the cathode.