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.
How to proceed
if you want a product galvanized
- 1
Measure the length, width and depth of the largest parts of your product. You will need them when choosing a suitable plant.
- 2
Read the guide How to prepare material for galvanizing. Bear in mind that width and depth affect how the material has to be prepared.
- 3
Go to I want to galvanize a product, or contact the nearest plant with a large enough bath.
We galvanize for
7,000+ customers a year
Top quality zinc coatings
We galvanize in accordance with the European standard HR EN ISO 1461.
The shortest delivery times
Streamlined processes and efficient logistics let us deliver quickly and dependably. You will always get your galvanized products on time.
Service tailored to you
Assessment of your order at your own factory or workshop, technological consulting and an individual, free price calculation. On request we also arrange transport of the steel to the plant and of the finished order back to you or straight to the site.
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. Serial products and one-off pieces. Structural steel parts, semi-finished and finished products that need durable, dependable corrosion protection. Street lighting columns, heavy profile structures for prefabricated halls, construction platforms, railing and balcony structures, trailers, doors, gates, fences, switchgear, benches or works of art in 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.