Intumescent Fireproof Coating for Steel Bridges in Coastal Environments AS/NZS 5131 & 1554

Why Coastal Bridges Need This Coating​

• • The Silent Attack — Salt: Chloride-rich air drives corrosion deep into unprotected steel; once chloride gets under the film, rust blisters and peels the coating from beneath.

• • The Slow Damage — Humidity & UV: Constant moisture feeds under-rust, while strong sun fades and chalks ordinary finishes, leaving the steel exposed.

• • The Sudden Danger — Fire: A fuel-fed fire can raise steel temperatures sharply; with no way to evacuate a bridge, the structure must hold for emergency response.

• • One Coating for All Three: A dual-protection system answers salt, weather and fire together — fewer coats, less maintenance, one reliable line of defense.

How the Coating Works​​

• • When Fire Strikes: The intumescent layer reacts to heat, forming a heat-insulating protective barrier — a built-in fire blanket that delays the steel reaching failure temperature.

• • When the Tide Blows In: The coating film blocks chloride and moisture, keeping corrosion out even in salt-spray and high-humidity conditions.

• • Under the Coastal Sun: A UV-stable formulation keeps the film intact through long, harsh sunlight.

• • Across the Whole Bridge: Applied consistently to girders, trusses, columns and connection nodes — the joints where coastal corrosion most often starts.

Where It Protects the Bridge​​

Bridge Part	Coastal Challenge	What the Coating Does
Above-water steelwork	Salt spray, UV, changing weather	Resists chloride attack, keeps the film intact
Splash & tidal zone	Wet–dry cycles, direct saltwater contact	Blocks moisture and chloride penetration
Connection nodes	Crevice corrosion + fire load	Protects joints from both rust and heat
Exposed outer steel	Visible finish under harsh sun	UV-stable, long-lasting appearance

Custom, Prefab & Export

• • Custom to the Exposure: Coating schemes tailored to your bridge's salt level, humidity range and climate — estuary, open coast or tropical shoreline.

• • Built in the Workshop: Prefabricated steel frameworks with coating applied in a controlled workflow, so site work is minimal.

• • Drawings Checked First: Our team reviews your drawings and specifications before production.

• • Export-Ready Delivery: Export packing, documentation coordination and shipping for overseas coastal projects.

• • One-Stop Supplier: Also supplies steel structures & trusses, composite floor decking and custom steel components.

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Standards & Compliance

Our coating and fabrication work follows AS/NZS 5131 & AS/NZS 1554 requirements for structural steel fabrication, welding coordination and project compliance. All products are manufactured and tested to international standards including ISO 9001, CE/EN 1090, ASTM, AISC, AWS D1.1, AS/NZS 1397 and AASHTO — supporting clients in Australia, New Zealand and global markets.

Build Better Coastal Bridges With FASECbuilding

A coastal bridge must hold against fire today and salt, sun and sea every day after. At Hangzhou FAMOUS Steel Engineering Co., Ltd. (FASECbuilding), with over 20 years of experience as an integrated manufacturer and trader, we provide one-stop solutions for steel structures and components, and have exported to more than 100 countries and regions. We also offer customized bridge steel products, including steel bridge frameworks, girders, trusses and connection components, manufactured to international bridge standards such as AS/NZS 5131, AS/NZS 1554, Austroads ATS 5410, AASHTO LRFD, AWS D1.5, EN 1993 and AS 5100. Whether you need custom coating support, prefabricated steel frameworks or export-ready supply for your next coastal bridge project, our team is ready to support you. Contact us today for detailed product information, customized solutions based on your local design codes and professional after-sales support. Let's build safer, stronger and longer-lasting coastal bridge steel projects together.