What are the surface treatment methods of H-section steel?
The surface treatment of H-section steel is crucial for its corrosion resistance, service life, appearance, and bond strength with concrete.
Anti-corrosion treatment (the most fundamental and most commonly used)
To isolate moisture, oxygen and corrosive media, thereby preventing the steel from rusting.
Painting/Spraying
Suitable applications: Virtually all sectors, from building structures and bridges to industrial buildings. Different coating systems and thicknesses can be designed according to the corrosive environment.
Hot-dip galvanizing
Suitable applications: Transmission towers, telecommunications masts, outdoor steel-framed structures, light steel studs, etc.
Thermal spraying of aluminium/zinc
Suitable applications: Heavy-duty structures such as large offshore platforms, bridges, and storage tanks where hot-dip galvanising is impracticable.
Fireproofing
To comply with building fire regulations, delaying the temperature rise of steel during a fire to maintain structural integrity.
Fireproof coating
Fireproof board cladding
Surface Cleaning and Pre-treatment (Essential Steps Prior to Coating)
Rust Removal
Degreasing
Treatment for composite concrete structures
No coating after rust removal
Install shear connectors
Apply light surface roughening
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