Reinforced concrete bridges and other maritime infrastructure are at high risk for corrosion related damage over its service life. These assets are subjected to harsh exposures that will degrade ordinary protective measures for reinforced concrete over time. Sacrificial (galvanic) cathodic protection (CP) systems have been used successfully to protect bridge and other reinforced concrete infrastructure in Texas for approximately 30 years. As these systems age, owners are faced with decisions regarding timing and need to replace existing CP systems. This paper will present case studies from recent testing of sacrificial CP systems from several infrastructure projects along the Texas gulf coast, with ages up to 25 years old. Results from testing indicate many of the CP systems are still offering some level of cathodic protection. Considerations and options for continued monitoring, maintenance and repair, or replacement of the CP systems are presented.

Subject
Zinc meshes, Steel structures, Test methods, Cathodic protection, Zinc anodes, Structures, Grout, Repair, Piles, Reinforced concrete, Corrosion protection, Jackets, Concrete
Keywords:
reinforced concrete, cathodic protection, corrosion, sacrificial systems, bridges, gulf coast
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2022
Association for Materials Protection and Performance (AMPP)
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