Analysis of Anti-Rust Treatment Methods and Key Quality Control Points for GRC Curtain Wall to Steel Structure Connections

The durability and safety of architectural curtain walls begin with the meticulous detailing of every connection. At the joints where GRC curtain walls meet steel structures, anti-rust treatment not only concerns the lasting aesthetic appearance of the building, but is also a core element in ensuring structural safety. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group draws on its full-chain technical strength to explain anti-rust solutions for GRC curtain wall and steel structure connections.

Corrosion Risks and Industry Pain Points of GRC Curtain Wall and Steel Structure Connections

With the advantages of light weight, high strength, and flexible shaping, GRC curtain walls are widely used in high-end buildings such as grand theaters and commercial complexes. However, their connection joints with steel structures are long exposed to complex environments such as humidity and temperature fluctuations, and are prone to reduced structural load-bearing capacity caused by metal corrosion. In one landmark project, improper anti-rust treatment led to corrosion-induced fracture of connectors after 5 years in service, resulting in millions in repair costs and compromising building safety. Through 2000+ project practices, Qinglong Group found that 80% of curtain wall connection failures stem from oversights in early-stage anti-rust processes.

Full-Process Anti-Rust Treatment Technology: A Systematic Solution from Materials to Processes

In line with the requirements of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong Group has developed a three-step anti-rust treatment system: Step one is substrate pretreatment, using sandblasting to reach the Sa2.5 standard, ensuring the surface roughness of the steel structure meets coating adhesion requirements; Step two uses hot-dip galvanizing with zinc content ≥95%, forming a protective layer over 85μm thick, delivering 3 times the corrosion resistance of ordinary cold galvanizing; Step three innovatively applies a composite process of fluorocarbon coating combined with a GRC interface agent, forming a physical isolation barrier at connection points, achieving anti-rust performance of over 20 years in accelerated aging tests.

Quality Control Essentials: Dual Safeguards from Laboratory to Construction Site

As a National High-Tech Enterprise, Qinglong has established a full-process quality control system: at its production base in Nanning, Guangxi, salt spray test chambers simulate marine climates to ensure the anti-rust coating achieves salt spray resistance of ≥1000 hours; on construction sites, torque wrenches precisely control the preload of connecting bolts, keeping errors within ±5%; BIM technology is innovatively introduced for digital pre-assembly of nodes, proactively avoiding the risk of coating damage caused by installation stress. In a provincial capital cultural center project, this system achieved a 100% first-time acceptance rate for connection joints, 25% higher than the industry average.

Qinglong's 28 Years of Technical Accumulation: A Leader from Standard-Setting to Engineering Practice

Qinglong Group, which participated in drafting multiple industry standards including the General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC), has incorporated anti-rust treatment into the full lifecycle management of GRC curtain walls. From material compatibility analysis in the detailed design stage, to third-party testing during construction, and periodic corrosion assessments in after-sales maintenance, a closed-loop service is formed. Its airport project in Southeast Asia achieved 15 years of zero corrosion at curtain wall connection points through this system, becoming a benchmark for anti-rust treatment in overseas projects.

The life of a building lies in its details, and anti-rust treatment is the invisible guardian of GRC curtain wall safety. Guided by the philosophy of "meticulous attention to detail and constant pursuit of excellence," Qinglong Group integrates 28 years of material R&D and engineering experience into every connection joint, providing designers with innovative solutions and delivering enduring architectural works for owners. Choose Qinglong—choose sustainable value that safeguards curtain wall safety and aesthetics from the source.