Keywords
Citation
(1999), "Lisbon landmark protected by IPC system", Anti-Corrosion Methods and Materials, Vol. 46 No. 2. https://doi.org/10.1108/acmm.1999.12846bab.007
Publisher
:Emerald Group Publishing Limited
Copyright © 1999, MCB UP Limited
Lisbon landmark protected by IPC system
Methods
Lisbon landmark protected by IPC system
Keywords Bridges, International protective coatings, Paints, Steel
When the three-year refurbishment and extension programme for Lisbon's Tagus Bridge was completed at the end of 1998, its steelwork had undergone protection by coating systems from International Protective Coatings (Plate 2).
This is the first major maintenance project for the government owned bridge, which has been a landmark since it was completed in 1966.
The Tagus Bridge has the world's longest continuous suspension truss 2,278 metres. The whole structure was blasted and repainted. At the same time a metal extension had been built underneath to carry a double track railway, and the bridge itself enlarged (Plate 3).
Around 500 tonnes of International's products were applied to 600,000 square metres of the structure, including 13,500 tonnes of new steel which was prepared in Oporto, north Portugal, and three separate locations around Lisbon.
The coating system specified for the new steel is Interzinc 315 followed by Intercure 420 and Interplus 880. On existing steelwork, Interplus 356 and 880 were used as the primer and final coat, respectively.
Plate 2 The refurbished Tagus Bridge in
Lisbon is protected by products from International Protective Coatings
Plate 3 A view of the underneath of the
refurbished Tagus Bridge in Lisbon
Interzinc 315 is a high-solids, low VOC metallic zinc-rich epoxy primer. Intercure 420 also has high-solids, low VOC characteristics. An epoxy micaceous iron oxide, used as an intermediate coating claims excellent barrier protection, low temperature cure and rapid overcoating properties.
Interplus 356 is a surface tolerant epoxy primer. It has metallic pigmentation with aluminium and lamellar micaceous iron oxide for increased corrosion resistance and claims excellent protection over less than ideally prepared steelwork.
Interplus 880, used as a topcoat on all the steel, is designed to offer excellent long-term protection in the most aggressive environments. A surface tolerant polyurethane, it is used as a single coat topcoat to provide a high-gloss colour retentive finish superior to that achieved with epoxy-based products.
Details from International Protective Coatings. Fax: +44 (0)171 612 1555; E-mail: jim.kavanagh@courtaulds.com; Website: http://www.international-pc.com