In building fire protection systems,steel fire-resistant windows serve as crucial fire-resistant partitions and lighting components.The moisture-proof and corrosion-resistant performance of their steel frames directly impacts their service life and safety.Steel frames treated with electrostatic spraying,through optimized coating structure and material selection,achieve reliable protection against indoor corrosion for five years,making them the preferred solution for public buildings and residential projects.
Electrostatic Spraying:A”Technological Shield”for Moisture-Proof Steel Frames
Electrostatic spraying utilizes a high-voltage electrostatic field to uniformly adsorb powder coating onto the steel frame surface.After high-temperature curing,a dense coating is formed.Its moisture-proof principle is as follows:
Coating Density:Under the influence of the electric field,the powder particles are tightly arranged,resulting in a coating porosity of<1%after curing,effectively blocking moisture penetration.For example,verified by salt spray testing(GB/T 10125),the electrostatically sprayed steel frame,after 1000 hours of continuous spraying in a 5%NaCl solution environment,showed no rust spots on the surface,far exceeding the national standard requirement of 240 hours;Adhesion enhancement:The coating bonds to the cold-rolled steel plate substrate through intermolecular forces.A cross-cut adhesion test(GB/T 9286)showed that the coating peeling area was<5%,ensuring long-term non-peeling;Chemical resistance:Powder coatings with added epoxy resin resist corrosive gases such as sulfur dioxide and nitrogen oxides in the air,making them suitable for humid environments such as kitchens and bathrooms.
Five-Year Rust Prevention:Dual Guarantee of Materials and Processes
The core of long-term moisture protection lies in the weather-resistant design of the coating system:
Primer Rust Prevention:Utilizing an epoxy zinc-rich primer with a zinc content≥80%,it delays corrosion of steel substrates through sacrificial anode protection.
Topcoat Weather Resistance:The polyester powder topcoat incorporates UV absorbers,maintaining its color for 10 years under indoor lighting conditions and resisting acid and alkali corrosion,adapting to complex working conditions.
Thickness Control:Total coating thickness≥80μm,with the topcoat accounting for 60%,ensuring coating abrasion resistance.No bare substrate is observed after 500 rubber rubbing tests.
Application Scenarios:From Public Areas to Residential Spaces
Commercial Buildings:Fireproof windows in evacuation routes of shopping malls and office buildings,offering outstanding abrasion resistance in high-traffic environments.
Residential Projects:Fireproof windows in elevator lobbies and kitchens,with a five-year maintenance-free feature reducing property maintenance costs.
Industrial Plants:Fireproof windows in equipment rooms,with a chemically resistant coating suitable for humid environments and environments containing corrosive gases.
Steel fireproof windows achieve”five years of moisture-proof and rust-free”through electrostatic spraying of steel frames.With the advantages of low cost and long life,they provide a sustainable solution for building fire safety and help build a safer and more durable building environment.