Outdoor carbon steel stairs are outdoor stairs made of carbon steel as the main material, with high strength, wear resistance, strong bearing capacity and other characteristics, but need to be enhanced by surface treatment (such as galvanized, spray) corrosion resistance. Suitable for outdoor scenes such as courtyard, balcony, industrial area, commercial space, etc
I. Definition and structure
Definition: A stair system with carbon steel (high carbon steel or low carbon steel) as the base material, assembled by welding, bolted connection, etc., often used in outdoor environments.
Structure composition:
Step: the main load bearing part, the material can be carbon steel plate, cast iron or composite material.
Vertical pole/handrail: support and protection structure, mostly carbon steel pipe or galvanized steel pipe.
Platform (optional) : A resting platform for multiple stairwells for increased stability.
Fasteners: expansion bolts, welding points, etc., used to connect with the ground or building structure.
2. Material characteristics
High strength: load-bearing capacity is better than aluminum alloy, suitable for heavy use (such as industrial areas, garages).
Wear resistance: Resistance to mechanical wear after surface hardening.
Economy: Low raw material costs, suitable for projects with limited budgets.
Carbon steel disadvantage
Easy to rust: rely on surface treatment (such as hot dip galvanizing, electrostatic spraying) rust prevention.
Large weight: heavier than aluminum stairs, installation needs to consider the foundation load.
3. Surface treatment process
The carbon steel is immersed in the molten zinc liquid to form a zinc layer (thickness ≥60μm), and the anti-rust life can reach more than 10 years.
Application scenario: Corrosive environment such as high humidity and coastal environment.
The surface of carbon steel is sprayed with polyester and epoxy resin powder, and the protective film is formed after high temperature curing.
Features: Rich color, UV resistance, suitable for urban landscape stairs.
Rust resistant paint treatment
Apply multiple layers of anti-rust primer and topcoat (such as polyurethane paint), which is low cost but requires regular maintenance.