Cathodic protection systems use electrochemical techniques to control deterioration of steel or concrete. Once limited to just protecting steelwork or rebar, CP based systems now exist to address the major concrete problems of carbonation and chloride attack.
By inhibiting the electrical processes necessary for corrosion, cathodic protection prevents it from occurring. This can be achieved either by applying a low-level current to the structure or adding sacrificial anodes to it. The exciting recent developments of chloride removal and realkanisation use a similar impressed-current approach to restore a correct chemical balance to deteriorated concrete.
Cathodic protection is a highly technical field and SRG has a successful track record on major government and infrastructure projects.
Typical cathodic protection services offered by SRG include:
- Bridge protection
- Jetty and wharf protection
- Foundation protection
- Carbonation correction (realkinsation)
- Removal of chlorides (desalination)