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51317--9539-Durability of Nano-Coating for Marine Highway Bridge Application

Nanoparticles are being considered in the development of durable coating systems due to their beneficial electrical and mechanical properties. The present study aims to investigate the corrosion performance of a nanoparticle enriched zinc rich primer (NPE-ZRP) for structural steel in aggressive marine exposure.

Product Number: 51317--9539-SG
ISBN: 9539 2017 CP
Author: Saiada Fuadi Fancy
Publication Date: 2017
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Coatings for structural steel have developed over the years to extend the service life of highway bridge structures by improving its corrosion durability and minimizing maintenance. Nanoparticles are being considered in the development of durable coating systems due to their beneficial physical chemical and mechanical properties. Interest lies particularly on the mechanical and electrical properties of carbon nanotubes (CNTs). The present research aims to investigate the effect of the carbon nanotubes in the zinc rich primer on corrosion durability. To study the influence of nanoparticles a commercially available of zinc-rich epoxy nano-coating was compared to a conventional zinc rich coating system. Test parameters included introduction of local coating defects to coating panels subjected to chloride environments. To evaluate the coating performance cyclic testing in wet and dry exposure as well as outdoor and salt-fog exposure has been carried out. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were carried out to identify the effect of the dispersion of CNTs on corrosion mitigation. Coating and corrosion behavior was analyzed by electrochemical impedance spectroscopy (EIS). Physical parameters such as changes in coating thickness and adhesion were also assessed to elucidate the extend of coating degradation.

Key words: Steel Bridge, Nanoparticle-Enriched-Epoxy-Primer, Corrosion, Durability, Marine Environment.

Coatings for structural steel have developed over the years to extend the service life of highway bridge structures by improving its corrosion durability and minimizing maintenance. Nanoparticles are being considered in the development of durable coating systems due to their beneficial physical chemical and mechanical properties. Interest lies particularly on the mechanical and electrical properties of carbon nanotubes (CNTs). The present research aims to investigate the effect of the carbon nanotubes in the zinc rich primer on corrosion durability. To study the influence of nanoparticles a commercially available of zinc-rich epoxy nano-coating was compared to a conventional zinc rich coating system. Test parameters included introduction of local coating defects to coating panels subjected to chloride environments. To evaluate the coating performance cyclic testing in wet and dry exposure as well as outdoor and salt-fog exposure has been carried out. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were carried out to identify the effect of the dispersion of CNTs on corrosion mitigation. Coating and corrosion behavior was analyzed by electrochemical impedance spectroscopy (EIS). Physical parameters such as changes in coating thickness and adhesion were also assessed to elucidate the extend of coating degradation.

Key words: Steel Bridge, Nanoparticle-Enriched-Epoxy-Primer, Corrosion, Durability, Marine Environment.

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