PVC-coated gabion boxes combine the structural strength of double-twist hexagonal mesh with the superior corrosion resistance of PVC coating over a galvanized core. Designed for aggressive environments where standard galvanizing alone is insufficient β marine, coastal, industrial, and chemical applications.
## Construction & Materials
The PVC-coated gabion uses a three-layer protection system:
- **Inner Core**: Q195 low-carbon steel wire, 2.5mm diameter β provides structural strength
- **Middle Layer**: Hot-dipped galvanized coating (>=200g/m2) β primary corrosion protection
- **Outer Layer**: PVC coating (0.5mm thickness) β secondary protection against UV, salt, and chemicals
The PVC coating is extruded directly onto the galvanized wire before weaving, ensuring complete coverage including at the twist points. Available in green (RAL 6005) and gray (RAL 7030) to blend with natural or built environments.
## Key Advantages
- **Superior Corrosion Resistance**: PVC coating provides an impermeable barrier against salt water, industrial chemicals, and acidic soils. Service life 30+ years in marine environments.
- **UV Stability**: PVC compound includes UV inhibitors preventing degradation from sunlight exposure. Color remains stable for 20+ years.
- **Aesthetic Options**: Green blends with natural landscapes. Gray complements urban and industrial settings.
- **Marine Grade Protection**: Approved for submerged marine applications β breakwaters, seawalls, and underwater scour protection.
- **Chemical Resistance**: Resistant to a wide range of industrial chemicals including acids, alkalis, and solvents.
- **All Benefits of Standard Gabion**: Flexibility, permeability, modularity, and ease of installation are identical to galvanized gabion boxes.
## Technical Specifications
| Parameter | Value |
|-----------|-------|
| Dimensions | 2.0m x 1.0m x 1.0m (L x W x H) |
| Mesh Type | Double-twist hexagonal woven |
| Mesh Aperture | 60mm x 80mm / 80mm x 100mm |
| Core Wire Diameter | 2.5mm |
| Total Diameter (with PVC) | 3.0mm (2.5mm + 0.5mm PVC) |
| Inner Galvanizing | >=200g/m2 hot-dipped |
| PVC Coating | 0.5mm, UV-stabilized |
| PVC Colors | Green (RAL 6005), Gray (RAL 7030) |
| Material | Q195 Low Carbon Steel Wire + PVC |
| Tensile Strength | 370-540 N/mm2 |
| Internal Diaphragms | 1 (2 cells) |
| Selvage Wire | 3.0mm core + PVC |
| Lacing Wire | 2.2mm core + PVC |
| Standard | EN 10223-3, ASTM A975 |
| Certification | ISO 9001, CE |
## When to Choose PVC-Coated vs Galvanized
| Environment | Recommended Type | Service Life |
|-------------|-----------------|--------------|
| Inland rural, dry | Galvanized (>=250g/m2) | 20-30 years |
| Urban, moderate humidity | Galvanized (>=250g/m2) | 20-25 years |
| Coastal (within 5km of sea) | PVC-coated | 30+ years |
| Marine submerged | PVC-coated | 25-30 years |
| Industrial/chemical | PVC-coated | 25-30 years |
| Acidic/alkaline soil | PVC-coated | 30+ years |
## Applications
- **Coastal Defense**: Seawalls, breakwaters, groynes, and revetments
- **Marine Engineering**: Underwater scour protection, artificial reef foundations
- **River Estuaries**: Tidal zone protection where fresh and salt water mix
- **Industrial Sites**: Containment walls in chemical plants, mines, and refineries
- **Highway Noise Barriers**: In areas with road salt exposure
- **Landscaping**: Decorative walls where color consistency is desired
- **Aquaculture**: Fish farm enclosures and marine cultivation structures
## Packaging & Delivery
- **Packaging**: Flat-packed bundles, steel strapped. PVC-coated lacing wire included.
- **Container Loading**: 20ft GP ~ 400-600 baskets; 40ft HQ ~ 800-1200 baskets (flat-packed, slightly bulkier than bare galvanized)
- **Lead Time**: 7-15 days standard; 15-25 days custom colors
- **Shipping**: FOB Tianjin / CIF / DDP