What Are the Anti-Rust Measures for Top-Burst Screws in GRC Component Installation?

Rust prevention treatment of expansion anchor bolts in GRC component installation requires targeted protective measures based on the service environment and load requirements. Qinglong Group has developed a four-in-one anti-rust technology system covering material selection, surface treatment, installation techniques, and regular inspections through large-scale projects. In the Shenzhen Pingshan High-tech Zone Comprehensive Service Center project, we ensured the reliability of the connection system over long-term use through measures such as stainless steel materials, galvanizing treatment, and regular maintenance.

Material selection is the foundation of rust prevention treatment. Expansion anchor bolts should be made of appropriate materials according to the degree of environmental corrosion. In general environments, galvanized carbon steel bolts can be used; in humid environments or corrosive environments of class C3 or above, 304 stainless steel should be selected; in coastal areas or corrosive environments of class C4 or above, 316 stainless steel is recommended. Qinglong strictly controls bolt materials, with material certificates and sampling tests conducted for every batch of incoming materials to ensure compliance with design requirements. In the Hainan International Convention and Exhibition Center project, this material selection strategy effectively prevented bolt corrosion problems.

Surface treatment quality directly affects the protective effect. For galvanized bolts, the galvanized layer thickness should be no less than 15μm, with passivation treatment applied to improve corrosion resistance. Stainless steel bolts can be passivated as needed to enhance the density of the surface oxide film. Qinglong has established a strict incoming inspection system, using coating thickness gauges and other equipment to test surface treatment quality, ensuring that every bolt meets standard requirements. For bolts used in special environments, advanced surface treatment technologies such as Dacromet can also be adopted.

Installation standardization is equally important. During installation, damage to the bolt surface coating should be avoided, and a torque wrench should be used to control tightening force, preventing coating damage caused by over-tightening. After installation, exposed parts should receive necessary protective treatment, such as applying anti-rust grease or adding protective caps. In the Nanning New Media Center project, we developed detailed installation work instructions and implemented strict control over every step to ensure installation quality.

Regular inspection and maintenance are important supplements to rust prevention treatment. Qinglong recommends establishing a regular inspection system for connection systems, focusing on checking bolt corrosion, tightening status, and protective layer integrity. For identified corrosion problems, timely rust removal and paint touch-up treatment should be carried out. Maintenance records should be established to document each inspection and repair, providing a basis for preventive maintenance. Through refined protection throughout the entire life cycle, expansion anchor bolts can meet the requirements of the design service life.