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Long-Term Case Studies Of Cathodic Protection Along The Texas Gulf Coast

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Managing aging reinforced concrete infrastructure is a complex and capital-intensive task, particularly in harsh marine and coastal environments. Corrosion from saltwater, coupled with wet and dry cycles, are particularly problematic for long-term durability of reinforced concrete. The Gulf Coast presents a challenge for maintaining service life of concrete structures that are exposed to high levels of chlorides, either by direct contact with salty or brackish water or by indirect contact with salt spray. Chlorides induce corrosion of the steel reinforcement which initiates cracking and spalling of the concrete, reducing the service life of the structure.

Product Number: 51322-17734-SG
Author: Stephen W. Foster, Kyle Myers
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings and Linings , Coatings
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$20.00
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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.

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.

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