What Are the Material Requirements for Embedded Parts in UHPC Component Installation? Anti-Rust Standards and Qinglong Group Connection Technology

The materials of embedded parts for UHPC component installation must meet requirements for high strength, corrosion resistance, and weldability, with core indicators including tensile strength ≥500MPa and no red rust after ≥1000 hours of salt spray testing. Qinglong Group strictly selects 316 stainless steel (Cr 16-18%, Ni 10-14%) or hot-dip galvanized carbon steel (galvanized coating ≥85μm) as embedded part materials. In coastal projects such as the Hainan International Convention and Exhibition Center, inspection after 10 years of use showed no corrosion, with a connection safety factor ≥2.5. Embedded part design must avoid galvanic corrosion by placing insulating gaskets between the embedded parts and the UHPC substrate, ensuring reliable performance throughout the 50-year design life.

Advantages of Stainless Steel Embedded Parts

316 stainless steel has a pitting resistance equivalent (PREN) ≥25 in Cl- environments, making it suitable for coastal areas. We ensure welding strength through argon arc welding, followed by pickling and passivation treatment after welding. The anchorage length of embedded parts is ≥15d (where d is the rebar diameter), with pull-out resistance ≥5kN.

Cost-Effectiveness of Hot-Dip Galvanized Carbon Steel

The galvanized coating thickness is ≥85μm, withstanding salt spray testing for up to 1000 hours. Suitable for inland areas, at 60% of the cost of stainless steel. Qinglong Group conducts strict inspections to ensure the galvanized coating is free of uncoated spots.

Insulation Treatment and Long-Term Protection

Nylon gaskets (thickness ≥2mm) are placed between embedded parts and UHPC to block electrochemical corrosion. Regular inspection and maintenance extend the service life.