About hot-dip galvanizing
Hot-dip galvanizing SIGNUM
What is hot-dip galvanizing?
Hot-dip galvanizing is the most effective protection of steel against corrosion. The process involves immersing a cleaned steel product into molten zinc at a temperature of around 450 °C, creating a durable zinc coating. This coating protects the steel both actively and passively and lasts for decades without maintenance.
The difference between hot-dip and electrogalvanizing?
HOT-DIP GALVANIZING
Immersion in molten zinc (450 °C)
ELECTROGALVANIZING
Electrolytic plating in a bath
HOT-DIP GALVANIZING
50–150 μm (thick, approx. 10× more than galvanic)
ELECTROGALVANIZING
5–15 μm (thin)
HOT-DIP GALVANIZING
30–50 years (or more depending on the environment)
ELECTROGALVANIZING
1–10 years (depending on conditions)
HOT-DIP GALVANIZING
High – mechanical and chemical
ELECTROGALVANIZING
Lower – rather decorative protection
HOT-DIP GALVANIZING
Outdoor structures, masts, fences, halls, bridge components
ELECTROGALVANIZING
Smaller parts, interior elements, design
Benefits of hot-dip galvanizing
Long service life
It reliably lasts for decades without the need for maintenance, even in demanding outdoor conditions. In practice, this means the structures do not need to be regularly painted or otherwise treated.
Comprehensive protection
The zinc layer covers the entire surface of the product, including edges, corners, cavities and joints, where other surface treatments often cannot reach. As a result, every detail of the structure is protected.
Mechanical resistance
The layer created during hot-dip galvanizing is firmly bonded to the steel, and therefore resists abrasion, impacts and weather effects. The surface thus does not peel or crack like conventional coatings.
Long-term savings
It is a one-time investment, maintenance costs practically disappear. In total, hot-dip galvanizing thus becomes the most advantageous solution.
Eco-friendliness and sustainability
Zinc makes meaningful use of its long service life, so the consumption of materials and energy for repeated production is reduced. Zinc is also fully recyclable.
Aesthetic appearance
The surface has a uniform, metallic glossy colour that looks technical and elegant.
Hot-dip galvanizing step by step
What do we galvanize?
Everything that can be galvanized. Series products as well as individual pieces. Structural steel parts, semi-finished products and end products that need durable and reliable protection against corrosion. Whether it is traction masts or public lighting masts, heavy profile structures of assembled halls, construction platforms, railing and balcony structures, trailers, gates, doors, fences, substations, benches or even works of art made of steel
Suitable materials
Common carbon steel
The most common and most suitable option.
Low-alloy steels
With the right composition, they guarantee a uniform coating.
Cast iron parts
For smaller components, hot-dip galvanizing is a reliable protection against corrosion.
Special galvanizing services
Centrifugal hot-dip galvanizing
FOR SMALL PARTS
The zinc layer covers the entire surface of the product, including edges, corners, cavities and joints, where other surface treatments often cannot reach. As a result, every detail of the structure is protected.
Passivation against white rust
FOR AN ATTRACTIVE APPEARANCE
Preservation or passivation of the zinc coating against white rust makes it possible to maintain the appearance of freshly galvanized material in the long term and protects the coating from oxidation.
Duplex coatings
FOR THE LONGEST ANTI-CORROSION PROTECTION
The combination of hot-dip galvanizing and a paint layer ensures up to 2.3× longer corrosion protection life. In our modern paint shop in Hustopeče, we apply this durable duplex treatment to finished galvanized products for you.
Quality is a matter of course for us.
Browse our hot-dip galvanizing certificates