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Solvent-based acrylic carbon paint anodes were installed on the north approach spans of the Yaquina Bay Bridge (Newport OR) in 1985 and performed well after 15 years. Anodes were inexpensive and repairs easy. Depolarization potentials are consistently above 100 with long-term current densities around 2 mA/m 2. Bond strength remains adequate.
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Weathering performance of 2-component polyurethane topcoats used in corrosion protection applications, e.g. bridges, marine, stadiums, etc., is discussed with emphasis on some key formulating variables. Variables such as isocyanate index and resin selection are compared in an accelerated weathering study using various polyurethane topcoats. The results are referenced to SSPC polyurethane coating specifications which are often used in the industry to define performance criteria.
This is the final paper in a series of papers that discusses weathering performance of 2-component (2K) polyurethane topcoats used in corrosion protective coatings applications, e.g., bridges, marine, stadiums, etc., with emphasis on the key formulating variables affecting performance.
There are advantages to Post-tensioned (PT) concrete construction compared to conventional reinforcement. However, corrosion caused tendon failures have recently been reported d/t chemically and/or physically deficient grout. A predictive model has been developed that projects onset and rate of wire and strand fractures.
Galvanic coupling corrosion risk between connection bolt materials and ASTM A1010 structural steel. ASTM A1010 has recently emerged for the construction of more corrosion-resistant bridges.
Cathodic Protection of a 57 km long pipeline section requires a few milliAmps of CP current. A new motorway bridge is built above the pipeline causing a potential risk of shielding the low cathodic current.
This paper examines the restoration of the Robert F. Kennedy (Triborough) Bridges - lead removal and painting approaches for the three bridges which compose one of the largest and most controversial structures in NYC. The techniques employed reflect typical approaches as well as some unique operations associated with the rehabilitation of major bridge structures.
This paper describes the results of a research study to determine the effectiveness of various rehabilitation materials and techniques for concrete bridges. This work reflects the needs for identifying effective materials and techniques to offer protection against corrosion of steel in concrete as well as patch repair in concrete girders.
This paper provides an overview of the main properties of duplex stainless steels in terms of chemical composition, mechanical and physical properties. Then, the results of an extensive atmospheric field test program are reported,
In some quarters of society there is a public outcry regarding the significant corrosion, coatings deterioration and safety concerns associated with North American bridges. Against this backdrop, this paper describes the application more than 20 years ago of an innovative coating system for the rehabilitation and lead abatement of a major truss bridge superstructure in Alberta, Canada.
This paper identifies the problems and challenges with the making of the Bridge Brothers documentary, from its inception to the distribution. It will discuss the intent of the film from the perspective of the filmmakers, and the bridge painting contractor. The documentary explains the importance of re-painting and rehabilitating our nation’s bridges, while exploring life on the bridge for the industrial bridge painters (Bridge Brothers) on the Commodore Barry and Walt Whitman Bridges in Philadelphia.
RARELY SEEN RESEARCH: Bridges: A Look Back—Historic Studies in Cathodic Protection: The 1990s, is a companion book to Bridges: A Look Back—Case Studies in Cathodic Protection: Substructures and Bridges: A Look Back—Case Studies in Cathodic Protection: Superstructures, both of which consist of nearly 30 years of curated legacy NACE technical papers and journal articles that cover exactly what the titles suggest.
This book consists of edited case histories, while the two original titles are compiled of the original, unabridged technical papers and journal articles.
2023 AMPP, 6 x 9 trim size, 52 pages, color