Wanzhou Second Yangtze River Bridge, Chongqing

Project overview

The Wanzhou Yangtze River Second Bridge is an extra-large suspension bridge connecting the main urban area of Wanzhou with the Jiangnan New District, with a total length of 1148.86 m and a main span of 580 m, with four lanes in both directions, serving as a river crossing in the hinterland of the Three Gorges reservoir area. The project is included in the bridge section of COSCO Kansai's Industrial Anticorrosive Coating Project Cases.

Anti-corrosion (fire protection) challenge

• The river surface in the reservoir area is hot and humid all year round, with moisture condensation in the winter and spring fog season; the steel structures are in a high-humidity environment for long periods;
• The steel trusses of the suspension bridge and the main cable anchorage zones have complex shapes, with poor coating accessibility;
• The bridge is a hundred-year project; the colour and gloss retention and long-term corrosion protection requirements of the topcoat are far higher than for ordinary municipal structures.

Coating system

*The table lists the coating systems or system directions recorded in the manufacturer's documentation; specific models and film thicknesses are subject to the project technical documents.

Source

COSCO Kansai Industrial Anticorrosive Coating Project Cases (bridge and municipal section, page 4); public project information for the Wanzhou Yangtze River Second Bridge.