Analysis of Anti-Rust Measures and Implementation Key Points for Top-Burst Screws in GRC Component Installation

In the installation of GRC components, expansion anchor screws serve as the key nodes connecting the structure to the components, and their anti-rust treatment directly affects the durability and safety of architectural decoration. Qinglong Group, a national high-tech enterprise with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, has drawn on more than one thousand engineering projects to develop a systematic solution for the anti-rust treatment of expansion anchor screws, providing professional technical support for designers, owners, and contractors.

Hazards of Expansion Anchor Screw Corrosion in GRC Components and Industry Pain Points

As the "lifeline" between GRC components and the base structure, expansion anchor screws are exposed to outdoor environments for long periods and are prone to rusting under the influence of rain, humidity, temperature differences, and other factors. Inadequate anti-rust measures may reduce screw strength and cause components to loosen or even fall off, which not only compromises the building's appearance but also creates safety hazards. The industry currently faces problems such as non-standardized anti-rust processes, arbitrary material selection, and lack of later-stage maintenance, making standardized technical guidance urgently needed.

Qinglong's Core Technical Solution for Anti-Rust Treatment of GRC Expansion Anchor Screws

Based on material characteristics and engineering experience, Qinglong has established a three-in-one anti-rust system of "pre-treatment – coating protection – sealing and waterproofing". First, screws must undergo surface rust removal before installation, using sandblasting or pickling processes to remove the oxide layer and ensure coating adhesion. Second, dual protection of hot-dip galvanizing plus fluorocarbon coating is applied, with a zinc layer thickness of no less than 85μm, and the fluorocarbon paint must meet the standard of more than 5,000 hours in salt spray resistance testing. Finally, silicone sealant is used to seal the screw heads and surrounding gaps, forming a physical barrier. This process has been applied in projects such as the Nanjing East Road Century Plaza renovation, withstanding more than 5 years of outdoor exposure with remarkable anti-rust performance.

Key Points for Anti-Rust Implementation During Construction and Installation

At GRC component installation sites, Qinglong emphasizes that "details determine success or failure". Before construction, the base must be tested for dryness, and work should be postponed if the moisture content exceeds 8%. During installation, torque wrenches are used to control tightening force, preventing coating damage caused by excessive stress. Exposed parts of screws must be sealed within 2 hours to prevent rainwater penetration. In addition, Qinglong's original "QR code traceability system" records the production batch and anti-rust process parameters of every batch of screws, achieving full life-cycle quality control.

Full-Chain Service Support and Contributions to Industry Standards

As a participating developer of the Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Building Engineering (JGJ/T 423-2018), Qinglong has incorporated anti-rust technology into its enterprise standards and implemented it through integrated services covering detailed design, manufacturing, and construction installation. For coastal high-humidity regions or corrosive environments, customized anti-rust solutions are provided, such as 316 stainless steel screws combined with nano-ceramic coatings, to meet the requirements of special scenarios.

Qinglong Group has always upheld the mission of "creating beautiful architecture", transforming 28 years of technical expertise into an ultimate pursuit of detail. From material selection to process innovation, and from standard setting to engineering practice, Qinglong is committed to providing the industry with replicable and scalable GRC component installation solutions, using professional strength to safeguard the lasting expression of architectural safety and aesthetic value.