Solutions for Waterborne Industrial Coatings in Bridge Steel Structures

Bridges endure various weather conditions over long periods, such as wind, rain, sun exposure, and snow, and are constantly exposed to humid environments, making them highly susceptible to corrosion and damage. Therefore, the protection requirements for bridge steel structures are extremely stringent. Bridge steel structures, especially large bridges, require coating solutions with high corrosion resistance, weather resistance, environmental friendliness, and excellent decorative properties. Heavy-duty anti-corrosion series long-term protection solutions should be adopted.

This article shares recommended protection solutions for bridge steel structures, covering the protection of the outer and inner surfaces of steel box girders and bridge deck steel plates.

The recommended protection solution uses a zinc-rich anti-rust primer with a high zinc powder content, offering excellent long-lasting rust prevention, corrosion resistance, and weather resistance. It boasts excellent film adhesion, strong impact resistance, and is suitable for priming and rust prevention of large outdoor steel structures. A high-protection water-based epoxy micaceous iron oxide intermediate coat is widely used for heavy-duty corrosion protection or long-term protection in industrial environments with various high corrosive levels. Recommended matching topcoat products offer bright and vibrant colors, a wide selection, high gloss and color retention, excellent UV resistance, and superior protective and weather-resistant properties.

This recommended solution is based on typical conditions. Different product series of varying quality can be selected for different usage environments and requirements. For small bridges and other structures with medium to high protection requirements, a modified alkyd system can be used.