Anti corrosion solution for bridge steel structure
Bridge Steel Structure Corrosion Background
Steel structures are virtually present in all critical parts of bridge construction: steel beams, steel bridge decks, steel piers, steel abutments, steel railings, steel towers, wave-shaped guardrails, etc.
Bridge steel structures are constantly exposed to natural environments, inevitably suffering from corrosion by rainwater, atmospheric pollutants, and other contaminants. This not only leads to rust spots and flaking on the surface of the steel but also severely weakens the mechanical properties and load-bearing capacity of steel components, increasing the risk of structural failure.
To ensure the safety and durability of bridges and reduce economic losses, continuous efforts must be made to strengthen anti-corrosion work for bridge steel structures, adopting high-performance anti-corrosion materials to improve the anti-corrosion performance of bridges.
Bridge Steel Structure Anti-Corrosion Coatings
Graphene Zinc Paint
Graphene zinc paint, also known as epoxy graphene zinc powder paint, epoxy graphene rich zinc paint, or pure graphene zinc paint, introduces intrinsic graphite from pure carbon based on the cathodic protection mechanism of zinc. By optimizing the formula, it fully activates high-purity zinc, achieving a combined cathodic protection, shielding effect, and inhibitory action against corrosion, demonstrating outstanding anti-corrosion performance.
The coating has excellent adhesion, superior crack-resistant mechanical properties, salt spray resistance exceeding 5000 hours, and a配套 system that passes 4200-hour cyclic corrosion tests, meeting the specifications outlined in the technical conditions for anti-corrosion painting of highway bridge steel structures.
Epoxy Epoxy Rust Inhibitive Primer
The coating serves dual functions as a primer and intermediate coat, featuring strong penetration capabilities, excellent shielding protection, high adhesion, and compatibility with various primers and topcoats.
Fluorocarbon Paint
The paint film exhibits excellent adhesion, hardness, extraordinary weather resistance, gloss retention, color retention; superior chemical resistance; and good dirt repellency and self-cleaning properties. It is suitable for advanced protection and decoration of steel or concrete surfaces of various bridges, machinery, or important engineering projects.
Bridge Steel Structure Protective Coating System
| Painting Location | Coat | Type of Paint | Number of Coats/Dry Film Thickness (μm) | Total Film Thickness (μm) |
|---|---|---|---|---|
| Outer Surface and Ancillary Steel Components | Primer | Graphene Zinc Paint | 1 / 70 | 330 |
| Intermediate Coat | Epoxy Epoxy Rust Inhibitive Primer | 2 / 190 | ||
| Topcoat | Fluorocarbon Paint | 2 / 70 | ||
|
Stringer, Web Inner Surface (Non-Closed Environment) |
Primer | Graphene Zinc Paint | 1 / 60 | 340 |
| Intermediate Coat | Epoxy Epoxy Rust Inhibitive Primer | (1~2) / 120 | ||
| Topcoat | Epoxy Thick Paint | (1~2) / 160 | ||
|
Stringer, Web Inner Surface (Closed Environment) |
Primer | Graphene Zinc Paint | 1 / 60 | 240 |
| Topcoat | Epoxy Thick Paint | (2~3) / 180 | ||
|
Motor Vehicle Bridge Deck Panel Pedestrian Bridge Deck Panel |
Primer | Graphene Zinc Paint | 1 / 80 | 80 |
|
Wet-Dry Transition Zone (Im1) Underwater Zone (Im2, Im4) |
Primero-Topcoat Combined | Epoxy Glass Flake Paint / Graphene Solvent-Free Abrasion and Drag Reduction Paint | 3 / 900 | 900 |
|
Wet-Dry Transition Zone (Im2, Im4) |
Primero-Topcoat Combined | Epoxy Glass Flake Paint / Graphene Solvent-Free Abrasion and Drag Reduction Paint | 4 / 1200 | 1200 |
|
Underwater Zone (Im1) Buried Area (Im3) |
Primero-Topcoat Combined | Epoxy Glass Flake Paint / Graphene Solvent-Free Abrasion and Drag Reduction Paint | (2~3) / 600 | 1200 |
The above bridge steel structure protective coating system is designed for a corrosion protection life > 25 years. The final coating system design should consider the environmental conditions of the project, required service life, investment budget, base material for anti-corrosion, and environmental requirements.
Contact Deqian Xincai to get a comprehensive anti-corrosion coating solution for bridge steel structures tailored to your needs according to industry standards and our extensive experience in anti-corrosion.
Performance Requirements of Bridge Steel Structure Protective Coating Systems
| Corrosion Environment | Water Resistance (h) | Salt Water Resistance (h) | Chemical Resistance (h) | Adhesion (MPa) | Salt Spray Resistance (h) | Artificial Climate Aging Resistance (h) | Cathodic Disbonding Resistance (h) |
|---|---|---|---|---|---|---|---|
| C3 | 72 | - | - | ≥5 | 1000 | 1500a | - |
| C4 | 240 | - | 72 | 2000 | 3000a | - | |
| C5 | 480 | - | 168 | 3000 |
4000a 3000b |
- | |
| CX | 720 | - | 240 | 4000 |
5000a 4000b |
- | |
| Im1 | 4200 | - | 72 | ≥8 | - | - | - |
| Im2 | - | 4200 | 4200 | - | - | ||
| Im3 | - | 4200 | - | - | - | ||
| Im3 | - | 4200 | 4200 | - | 4200 |
The performance requirements of the above bridge steel structure protective coating systems are based on the standard JT/T 722-2023 Technical Conditions for Anti-Corrosion Painting of Highway Bridge Steel Structures.
Note: In C5 and CX corrosion environments, either Xenon Arc Accelerated Aging Test or Super Fluorescent UV Accelerated Aging (UVB313) can be selected. a: Xenon Arc Accelerated Aging Test. b: Super Fluorescent UV Accelerated Aging (UVB313).
All bridge steel structure protective coating systems provided by Deqian Xincai meet the above performance requirements.
Bridge Steel Structure Anti-Corrosion Coating Manufacturer
Deqian Xincai is a national brand dedicated to the research, development, production, sales, and integrated painting services of high-performance anti-corrosion coatings. We provide anti-corrosion materials for bridges and undertake anti-corrosion work for various bridges.
For inquiries about anti-corrosion coating prices for bridge steel structures, anti-corrosion paint performance for bridge steel structures, anti-corrosion coating schemes for bridge steel structures, anti-corrosion painting package prices for bridges, etc., please contact us by phone: 400-680-8502
