As a part of a major rehabilitation programme of the Sydney Opera House (photo 1), cathodic prevention and cathodic protection systems were installed to protect new precast elements, the soffit and piers under the western broadwalk. The CP installation was carried out using a grid anode installed in the new precast elements, before concrete casting or put in concrete slots cut into the soffit and piers. The system was energised in May 1996. This paper describes the design criteria, installation and system performance after energizing the system.
Keywords: cathodic prevention cathodic protection, corrosion in concrete, monitoring, potential.