2025-02-24    87

With today's poor air quality, steel structures—especially those permanently exposed outdoors—face significant corrosion challenges. Steel factory buildings, widely used in industrial facilities for their large-span designs accommodating heavy machinery and spacious layouts, offer rapid construction advantages. However, their inherent weakness lies in corrosion susceptibility. Below are two primary anticorrosion methods:

1. Hot Spray Aluminum (Zinc) Composite Coating

This long-lasting method involves:

• ‌Surface preparation‌: Sandblasting to remove rust and create a textured metal surface.
• ‌Thermal spraying‌: Melting aluminum/zinc wires with an acetylene-oxygen flame and spraying the molten particles onto components using compressed air, forming an 80–100μm porous coating.
• ‌Sealing‌: Filling micropores with epoxy resin or chloroprene rubber paint to create a composite barrier.

Note: This method cannot protect tubular components' inner walls. Hermetic sealing at both ends is required to prevent internal corrosion.

2. Paint Anticorrosion Treatment

A three-layer paint system is essential:

• ‌Primer‌: Forms adhesion and initial corrosion resistance.
• ‌Intermediate coat‌: Enhances protection thickness.
• ‌Topcoat‌: Provides weather resistance and aesthetics.

Selecting premium-grade paints tailored to factory environments is critical for maximizing corrosion resistance.

‌Key Advantages‌
Both methods balance durability with industrial practicality, addressing steel structures' vulnerability while maintaining cost-effectiveness for large-scale facilities.