China Coated Barbed Wire – Top Supplier

Coated barbed wire combines a high‑tensile steel core with protective layers that resist corrosion and mechanical wear. Understanding the coating type, thickness, and core specifications helps engineers select a product that meets site‑specific security and durability requirements.

Material and Coating Specifications

The core is typically made from low‑carbon steel wire with a diameter ranging from 1.8 mm to 2.5 mm, providing a tensile strength of 450 MPa to 550 MPa. A first layer of hot‑dip zinc coating (galvanization) is applied at 50 g/m² to 120 g/m², followed by an outer polymer coating such as PVC or PE with a thickness of 0.3 mm to 0.8 mm. These layers act as a barrier against moisture, UV exposure, and chemical agents.

Manufacturing Process

Wire drawing reduces the steel rod to the target diameter, after which the wire is cleaned and passed through a zinc bath at approximately 450 °C. The galvanized wire then undergoes extrusion coating where molten polymer is forced around the wire, forming a uniform sheath. Finally, the coated wire is cut to length, twisted into barbs, and wound onto reels or coils under controlled tension to avoid coating damage.

Performance Characteristics

Typical tensile strength of the finished product exceeds 400 MPa, ensuring resistance to cutting and pulling forces. The combined coating provides a salt‑spray resistance of over 500 hours before red rust appears, depending on coating weight. Barb spacing is usually set at 75 mm to 150 mm intervals, with barb length of 15 mm to 20 mm, delivering effective deterrence while maintaining flexibility for installation.

Applications

• Perimeter security for industrial facilities, where corrosion resistance extends service life in coastal or chemical environments.
• Agricultural fencing that requires durability against livestock pressure and weathering.
• Temporary site enclosures for construction projects, allowing quick deployment and removal.
• Infrastructure protection such as railway substations and power stations, where mechanical strength and low maintenance are critical.

Quality Control

Each production lot undergoes dimensional checks using laser micrometers to verify wire diameter within ±0.02 mm. Coating thickness is measured by magnetic induction for zinc and ultrasonic gauges for polymer layers. Tensile strength is validated with a universal testing machine on sample lengths of 300 mm. Visual inspection ensures barb uniformity and absence of coating defects such as pits or blisters.

Customization Options

• Wire diameter: 1.8 mm, 2.0 mm, 2.2 mm, 2.5 mm (other sizes on request).
• Zinc coating weight: 50 g/m², 80 g/m², 100 g/m², 120 g/m².
• Polymer type: PVC, PE, or PP with custom color matching (RAL or Pantone).
• Barb spacing and length adjustable per security level.
• Roll length: 50 m, 100 m, 200 m, or custom lengths.

Packaging and Shipping

Finished coils are wrapped in stretch film and placed on wooden pallets with corner protectors. Each pallet is secured with steel straps and labeled with product code, length, weight, and coating specification. For export shipments, moisture‑absorbent desiccant packs are added, and the pallet is enclosed in a UV‑stabilized polyethylene cover to prevent coating degradation during transit.

Technical Specifications

Frequently Asked Questions