Hot-dipped galvanised wire is a steel wire coated with a protective layer of zinc through a process known as hot-dip galvanising. This involves immersing the wire in a bath of molten zinc, which forms a thick, tightly bonded coating that provides superior protection against corrosion, weather, and wear.
Key Characteristics of Hot-Dipped Galvanised Wire:
Excellent Corrosion Resistance: Zinc prevents rust and degradation in outdoor and high-moisture environments.
Exceptional Durability: The thick, bonded zinc layer stands up to abrasion, weather, and rough handling.
Available in a Range of Sizes: Suitable for agricultural, industrial, construction, and security applications.
Long-Term Value: Reduced maintenance and longer lifespan make it more cost-effective over time.
Hot-Dip Galvanising vs Electroplating: What’s the Difference?
It’s important to note that hot-dip galvanising and electroplating (also known as electro-galvanizing) are two completely different zinc-coating methods:
| Feature | Hot-Dip Galvanising | Electroplating (Electro-Galvanising) |
| Process | Dipped in molten zinc at high temperatures | Zinc applied through electric current in solution |
| Zinc Coating Thickness | Thick (often 50–240 g/m² or more) | Thin (often less than 10 g/m²) |
| Adhesion Strength | Metallurgically bonded – very strong | Mechanically adhered – weaker bond |
| Corrosion Resistance | Medium to High | Very Low |
| Durability | Long-lasting, withstands wear and tear | Prone to scratching and faster corrosion |
| Cost | Slightly higher upfront but better value long-term | Lower cost, but shorter lifespan |
Hot-dip galvanising is far superior to electroplating, especially for applications where durability and corrosion resistance are critical.
Why Zinc Coating Weight Matters
The thickness of the zinc coating, measured in grams per square meter (g/m²), plays a major role in how long the wire will last.
– Higher zinc coating = longer lifespan.
– Light coatings (40–60 g/m²) may suit indoor or light use, but outdoor, agricultural, or construction applications typically require 100–240 g/m² or more.
– In highly corrosive environments (e.g., marine or coastal areas), heavy zinc coatings are essential for longevity.
Other Benefits of Hot-Dip Galvanising
Cathodic Protection: Even if the coating is scratched or damaged, surrounding zinc continues to protect the steel—something electroplating and paint cannot do.
Low Maintenance: Once installed, galvanized wire needs little to no maintenance, minimizing upkeep costs.
Sustainability: Longer-lasting wire means fewer replacements, less waste, and a lower environmental impact.
Common Applications of Hot-Dipped Galvanised Wire
Agriculture: Fencing, vineyard trellising, livestock pens
Security: Barbed wire, welded mesh panels, perimeter fencing
Industry: Baling wire, packaging wire, fabricated wire components
Conclusion
Hot-dipped galvanised wire is the go-to choice when durability, reliability, and long-term performance matter. It offers significantly better protection than electroplated wire, thanks to its thicker, stronger, and longer-lasting zinc coating.
When selecting galvanised wire, always consider the application environment and the zinc coating weight. The higher the zinc content (g/m²), the longer your wire will last—even in the toughest conditions.
Investing in hot-dipped galvanised wire means investing in strength, protection, and peace of mind.
