Zhengyoujiang Bridge Closure: Jianbang Anti-Corrosion Coatings

The Zhengyoujiang River Bridge on the Nanning South Bypass Line has successfully completed its closure, marking an important milestone in the construction of this major infrastructure project. The final joining of the bridge spans lays a solid foundation for the subsequent completion and operation of the project.

Large steel-pipe arch bridge steel structures are exposed to water for long periods and face high humidity throughout their service life. If anti-corrosion protection is inadequate, corrosion damage can develop rapidly and significantly shorten the service life of the bridge. Therefore, the selection and application of a reliable heavy-duty coating system are critical to ensuring the long-term safety, durability and operational performance of the structure.

For this project, the complete set of anti-corrosion coatings is supplied by Jianbang Coatings. The system adopts a multi-layer, complementary protection design. The epoxy zinc-rich primer provides cathodic protection, locks down the steel substrate and prevents rust at the source. The epoxy micaceous iron oxide intermediate coat forms a lamellar shielding layer that helps block moisture penetration and strengthens barrier protection. The aliphatic polyurethane topcoat offers weathering and UV resistance, helping to maintain color and appearance during long-term outdoor exposure.

By combining cathodic protection, barrier shielding and weather-resistant surface protection, the full coating system provides comprehensive heavy-duty anti-corrosion protection for the steel structure in a humid riverside environment. This helps improve the durability of the bridge, reduce later maintenance pressure and support the long-term safe operation of the project.

The application of Jianbang Coatings’ full anti-corrosion system on this major bridge project reflects the company’s capabilities in serving major infrastructure construction. For infrastructure anti-corrosion, choose Jianbang—a trusted partner for major projects.