Cathodic protection manual for concrete bridges

tenance and monitoring of an innovative cathodic protection project named ‘Liggerkoppen’ (which translates to ‘beam heads’). The application phase of the project is covered in the paper ‘Application of durable cathodic protection systems applied on 30 concrete bridges with prestressing steel’ as pre-sented on ICCRRR In an interview, the Manager of DP Cathodic Protection for Reinforced Concrete Bridge Decks stated that after FHWA involvement in the cathodic protection industry was reduced in , many agencies had not yet acquired sufficient expertise in the technology and became dependent on vendors and mate- rial suppliers for all aspects of the use. The Federal Highway Administration has stated that “cathodic protection is the only rehabilitation technique that has proven to stop corrosion in salt-contaminated bridge decks regardless of the chloride content in concrete” (NCHRP Report, page 34). Cathodic protection can be grouped into two basic types of systems: impressed.

Cathodic protection is a means of reducing corrosion of a metal by artificially causing direct current to flow from external anodes, through the electrolyte (soil or water), and onto the structure to be protected. The two types of CP systems are galvanic anode and impressed current. Galvanic anode CP systems provide cathodic current by galvanic corrosion or by sacrificing one material to prevent corrosion of the other. This report describes the evolution of cathodic protection of reinforced concrete bridges and its current state-of-the-art. It discusses how cathodic protection works, and the effectiveness of the technique. An extensive history of cathodic protection of reinforced concrete is included that covers all aspects of completed projects. The cathodic protection system consists of platinum wire (primary anode), water-based carbon conductive coating of thickness 15 to 20 mil (secondary anode) and a white colored decorative paint. The cathodic protection system was designed to protect the --hammer head and the top 25 ft. of each pier. The potentials were measured using i.

thermal sprayed titanium anodes for cathodic protection (CP) of bridge The cobalt catalyst dispersed into the concrete near the anodeconcrete. Corrosion of prestress and post-tension reinforced-concrete bridges. K. Lau, I. Lasa, in Corrosion of Steel in Concrete Structures, MasterProtect® Anodes protect against corrosion in steel-reinforced concrete structures such as bridges, parking structures and piers.