Cathodic protection

In order to retain a competitive edge it is essential to keep on top of new technology.

One such example is cathodic protection and sacrifical anodes.  Basically corrosion to steelwork is caused by an electro-chemical reaction where hydroxide ions and ferrous ions combine to form ferrous hydroxide - which we all know as rust.  Sacrifical anodes are formed of an alloy which has a higher electro-chemical capacity and therefore diverts the chemical reaction away from the steelwork towards the anode - and the anode is 'sacrificed'.

Topbond have used this technology on a number of occasions, most recently at a bridge in Northumberland.  By installing the anodes in a string, connecting them to the steel reinforcement in the bridge and electrically charging them, the level of corrosion of the steel reinforcement can be dramatically reduced and the life of the structure extended.