Cathodic protection has over a number of years been used to arrest the corrosion of reinforcement in concrete. The process is based on protecting the metal from electrolytic corrosion by making it the cathode using a direct current (DC). Although cathodic protection has been used for sometime their exists two fundamental problems with the technique: 1 ) There is no means of controlling or determining the required current to ensure the correct protection is being achieved. Therefore it is necessary for engineers to frequently visit the sit to access the current being administered and undertake tests to establish its 2) Long and numerous connection cables are required to supply current to the anode cells located on the concrete structure. Cyberdan have recently been responsible for a novel technique for reducing the cabling required for cathodic protection and wish, as part of this project, to develop the technique further. At present each anode cell is supplied with a DC supply from a central rectifier unit which in turn is supplied from a main AC power source. This arrangement means that for each anode cell as many power cables are required. The protection equipment is therefore expensive and difficult to install. The main RTD goal can be summarised as following: - To research practical techniques to enhance cathodic corrosion protection for reinforced concrete whilst reducing operational costs. This will include the development of a distributed rectifier technique and an 'intelligent' cathodic protection control system.
Funding SchemeEAW - Exploratory awards