Research on Anti-Rust Treatment Methods and Quality Control Measures for GRC Curtain Wall and Steel Structure Connections

The durability of building curtain walls concerns not only aesthetic presentation but also directly affects building safety and service life. In the treatment of connection joints between GRC curtain walls and steel structures, anti-rust technology and quality control are the key factors determining project success. As an industry expert with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group has developed a systematic anti-rust solution through full-chain technical accumulation, providing reliable protection for more than a thousand landmark projects.

Corrosion Risks and Protection Logic of GRC Curtain Wall-to-Steel Structure Connections

GRC curtain walls are widely used in high-end buildings such as grand theaters and commercial complexes for their advantages of light weight, high strength, and flexible shaping. However, under environmental factors such as humidity and temperature variations, metal connectors are prone to electrochemical corrosion, leading to failure of connection joints. Based on the requirements of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), the Qinglong team has established a three-dimensional protection system of "material matching + multi-layer protection + long-term monitoring" to eliminate corrosion risks at the source.

Whole-Process Anti-Rust Treatment Techniques and Key Technologies

At the material selection stage, Qinglong uses hot-dip galvanized steel with stainless steel fasteners, verified by salt spray testing to achieve an anti-rust service life of more than 15 years. For projects in coastal environments with high humidity and high salinity, it has innovatively introduced zinc-aluminum alloy coating technology, improving corrosion resistance by 30% over traditional processes. In connection joint design, BIM technology is used to simulate stress distribution, and flexible anti-corrosion gaskets are adopted to prevent electrochemical corrosion caused by contact between dissimilar metals; this technology has been successfully applied in the renovation project of Century Plaza on Nanjing East Road.

In the manufacturing stage, Qinglong has established an automated sandblasting and rust removal production line to ensure steel surface treatment reaches the Sa2.5 standard, while strictly controlling coating thickness within the 80-120μm range. During on-site installation, a dedicated anti-corrosion sealant is used for joint waterproofing, forming a triple barrier of "metal plating + anti-corrosion coating + sealed protection". Notably, Qinglong's proprietary RFID chip traceability system records the production batch and installation information of each connector in real time, providing data support for later maintenance.

Quality Control System and Industry Standard Practices

As a participant in drafting the industry standard General Technical Requirements for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC), Qinglong carries quality control through the entire process of design, production, and construction. The laboratory is equipped with professional equipment such as salt spray test chambers and electrochemical workstations to quantitatively test the effectiveness of anti-rust treatment; the "three-inspection system" is implemented on construction sites, focusing on checking coating integrity, joint sealing, and anti-corrosion material compatibility. This rigorous approach has enabled projects undertaken by Qinglong, such as the Dongguan Women and Children's Activity Center, to maintain a zero-corrosion record at connection joints after 10 years of exposure to the elements.

Anti-rust treatment is the invisible cornerstone of GRC curtain wall projects, requiring both innovative breakthroughs in materials science and meticulous control in engineering management. With the technical strength of its national-level R&D center and 28 years of engineering practice, Qinglong Group is driving the upgrading of GRC curtain wall anti-rust technology toward systematization and intelligence. In the future, with the development of UHPC/GRC composite structure technology, long-term protection of connection joints will become a core guarantee of building safety, and Qinglong will continue to safeguard architectural aesthetics and structural safety with the philosophy of "meticulousness and constant pursuit of excellence".