Wanzhou Second Yangtze River Bridge, Chongqing
Large suspension bridge · Chongqing — Wanzhou
The Wanzhou Second Yangtze River Bridge is a large suspension bridge with a 580 m main span. Its main steelwork — trusses and anchorages — uses a long-life system of zinc-rich epoxy primer, MIO epoxy intermediate and fluorocarbon topcoat. The case is taken from Kansai's public project brochure.
Project overview
The Wanzhou Second Yangtze River Bridge links the main urban area of Wanzhou with the Jiangnan New District. It is 1,148.86 m long overall with a 580 m main span and four traffic lanes, and forms a river crossing in the heart of the Three Gorges reservoir region. The project is documented in Kansai's Industrial Anti-Corrosion Coatings case book (bridges volume).
Corrosion-protection challenges
- The reservoir surface is humid all year, and condensation in the winter–spring fog season keeps the steelwork permanently wet;
- Suspension-bridge trusses and main-cable anchorage zones have complex geometry that makes access for coating difficult;
- As a century-scale structure, the bridge demands far higher colour and gloss retention and durability from its topcoat than ordinary municipal steelwork.
Coating system
| Location | System | Notes |
|---|---|---|
| Main steelwork — trusses etc. | Zinc-rich epoxy primer + MIO epoxy intermediate + fluorocarbon topcoat | Kansai's long-life bridge fluorocarbon direction |
| Topcoat objective | Low-soiling fluorocarbon with colour and gloss retention | Suited to bridge aesthetics and long service life |
The table reflects the system or system direction stated in the manufacturer's material; specific products and film thicknesses are governed by the project's technical documents.
Sources
Kansai Industrial Anti-Corrosion Coatings case book (bridges & road infrastructure, p. 4); public project information on the bridge.
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Brand involved
The projects shown are documented in the coating manufacturers' own public material, and the coating work was carried out within the manufacturers' own systems. They are provided purely as a technical reference on coating application and have no supply, application or other connection with RichTech Industrial Technology (Shanghai) Co., Ltd.
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