A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Nano-Particle Enriched Epoxy Primer to Enhance the Durability of Highway Steel Bridges
Structural integrity of steel bridges can be compromised when it is inadequately protected from the exposure environment due to corrosion. In U.S., approximately 15% of all bridges are structurally deficient due to corrosion. Application of protective coatings has been widely used for corrosion mitigation of structural steel and zinc-rich-primer three-coat (ZRP) systems are the widely used since the 1980s. However, coating failure of ZRP has been identified within 15 years of application, well short of typical bridge design service life. Maintenance of bridge coating is costly and as estimated, annually half a billion dollar is spent only for coating maintenance of steel bridges. For these reasons durable novel coating systems are of interest. The present study aims to investigate the corrosion durability of a nanoparticle enriched zinc rich primer (NPE-ZRP) coating for steel infrastructure application in aggressive marine environment. A conventional ZRP coating was evaluated as a reference to assess the influence of nano-particles. Zinc consumption was attributed from the bulk primer layer for NPE-ZRP whereas for ZRP coating zinc consumption continues along the coating/steel interface. Comparative testing with regular ZRP showed similar positive results to date but improved performance in coating adhesive strength.
Nano-Particle Enriched Epoxy Primer to Enhance the Durability of Highway Steel Bridges
Structural integrity of steel bridges can be compromised when it is inadequately protected from the exposure environment due to corrosion. In U.S., approximately 15% of all bridges are structurally deficient due to corrosion. Application of protective coatings has been widely used for corrosion mitigation of structural steel and zinc-rich-primer three-coat (ZRP) systems are the widely used since the 1980s. However, coating failure of ZRP has been identified within 15 years of application, well short of typical bridge design service life. Maintenance of bridge coating is costly and as estimated, annually half a billion dollar is spent only for coating maintenance of steel bridges. For these reasons durable novel coating systems are of interest. The present study aims to investigate the corrosion durability of a nanoparticle enriched zinc rich primer (NPE-ZRP) coating for steel infrastructure application in aggressive marine environment. A conventional ZRP coating was evaluated as a reference to assess the influence of nano-particles. Zinc consumption was attributed from the bulk primer layer for NPE-ZRP whereas for ZRP coating zinc consumption continues along the coating/steel interface. Comparative testing with regular ZRP showed similar positive results to date but improved performance in coating adhesive strength.
Nano-Particle Enriched Epoxy Primer to Enhance the Durability of Highway Steel Bridges
Fancy, Saiada Fuadi (author) / Sabbir, Md. Ahsan (author) / Lau, Kingsley (author) / DeFord, Dale (author)
Structures Congress 2019 ; 2019 ; Orlando, Florida
Structures Congress 2019 ; 165-177
2019-04-22
Conference paper
Electronic Resource
English
Nano-Particle Enriched Epoxy Primer to Enhance the Durability of Highway Steel Bridges
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