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

The durability of a building curtain wall depends not only on the performance of the materials themselves, but also on the reliability of the connection joints. At the junctions where GRC curtain walls meet steel structures, anti-rust treatment and quality control are like the building's "immune system," directly affecting the safety and aesthetics of the overall structure. As an industry player with 28 years of dedicated experience in UHPC/GRC/GRG/GRP materials, Qinglong Group systematically analyzes the technical essentials of this critical link, from material properties and process standards to full-process control.

Corrosion Risks and Material Compatibility Principles for GRC Curtain Wall and Steel Structure Connections

GRC (Glass Fiber Reinforced Concrete) is widely used on the facades of landmark buildings for its lightweight, high-strength, and flexible shaping advantages, yet it differs fundamentally from the metallic properties of steel structures. When alkaline GRC material comes into direct contact with carbon steel, electrochemical corrosion is easily triggered—especially in humid, high-temperature, or coastal environments with high salt spray, where the corrosion rate grows exponentially. At the detailed design stage, Qinglong adheres to the "material compatibility" principle, using BIM technology to simulate corrosion paths under different environments, prioritizing hot-dip galvanized or stainless steel connectors, and pairing them with isolation gaskets to form a physical barrier, cutting off the corrosion chain at its source.

Building a Three-Level Protection System for Anti-Rust Treatment

In the manufacturing stage, Qinglong has established a three-level anti-rust system of "surface treatment – coating protection – sealing and isolation." For steel structure connectors, sandblasting is first performed to reach the Sa2.5 standard, ensuring surface roughness meets coating adhesion requirements; next, composite coating is applied using fluorocarbon paint together with a zinc-rich primer with zinc content ≥85%, with dry film thickness controlled at 80-120μm; finally, PVC isolation strips are embedded at the contact points between GRC components and the steel structure, and silicone structural sealant is injected for sealing, forming a dual waterproof barrier. This process standard has been certified under the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018) and has withstood practical testing in projects such as the Century Plaza renovation on Nanjing East Road.

Key Quality Control Points in the Construction and Installation Stage

On-site installation is the core stage where anti-rust effectiveness is realized. Qinglong's construction team uses 3D laser scanning technology for positioning, keeping connector installation errors within 2mm and preventing coating cracks caused by stress concentration. Addressing the challenges of high-altitude work, Qinglong innovatively developed a "modular pre-assembly" process, in which anti-rust treatment is completed on the ground before the assembly is hoisted as a whole, reducing on-site welding. Every procedure follows the "three-inspection system," with focused checks on coating integrity, insulation resistance (≥100MΩ), and sealant fullness, while RFID chips enable quality traceability. This full-process control capability enabled Qinglong to deliver projects such as the Dongguan Women and Children's Activity Center with zero corrosion risks.

Digital Management Solutions for Long-Term Maintenance

With building life cycles spanning decades, anti-rust treatment requires a dynamic maintenance mechanism. Drawing on more than 20 years of after-sales maintenance experience, Qinglong has built an IoT-based corrosion monitoring system that uses sensors to collect real-time data on temperature, humidity, and potential changes at connection joints, combined with AI algorithms to predict corrosion risks. Differentiated maintenance plans are developed for different usage scenarios: municipal projects undergo coating thickness testing once a year, coastal projects receive salt spray corrosion assessments every six months, and high-end buildings such as museums use endoscopes to inspect concealed areas. This "prevention-first" maintenance philosophy has extended the average service life of Qinglong's GRC curtain wall projects to more than 25 years.

From material selection in detailed design to intelligent monitoring in after-sales maintenance, anti-rust treatment for GRC curtain wall and steel structure connections is a systematic undertaking. As a national high-tech enterprise, Qinglong Group has always upheld an attitude of "meticulousness and the constant pursuit of excellence," transforming 28 years of full-chain experience into technical standards, providing designers with reliable solutions and safeguarding the safety and beauty of buildings for owners. In the field of new architectural decorative materials, only by carrying detail control through every link can the mission of "creating aesthetically beautiful architecture" truly be fulfilled.