- Blade Material
Hot-Dip Galvanized Steel: Cost-effective with good rust resistance (zinc coating ≥80g/m²), suitable for standard outdoor protection.
304 Stainless Steel: Excellent corrosion resistance (nickel content ≥8%), ideal for high-humidity, coastal, or chemically polluted environments, but more expensive.
- Core Wire Material
Hot-Dip Galvanized Steel Core Wire: Recommended diameter 2.5–3.0mm, with zinc coating thickness affecting tensile strength (e.g., 80-A grade galvanized steel).
Stainless Steel Core Wire: Best paired with 304 stainless steel blades for extended lifespan, but requires proper welding (recommend TIG welding).
- Surface Treatment
Hot-Dip Galvanizing: High durability (10–15 years outdoors), moderate cost.
Spray Coating/Cold Galvanizing: Better aesthetics, but lower corrosion resistance, suitable for short-term or low-corrosion environments.
- Special Application Needs
Military/Correctional Facilities: Must comply with security standards (e.g., BTO-22 with Y-posts, total height ≥2500mm).
Civil Protection: Optional colored spray coating (e.g., green, gray) for both security and aesthetics.
- Supplier Recommendations
Prioritize manufacturers with ISO certification or compliance with ASTM F2843 standards (e.g., suppliers in Tuolun, Anping, Hebei).
Request material test reports (e.g., zinc layer thickness, stainless steel composition analysis).
Note: Avoid mixing different materials (e.g., galvanized blades with stainless steel core wire), as galvanic corrosion may accelerate due to potential differences.
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