Hot-dip galvanizing

Long-term durability, a minimum of maintenance and an optimum operational solution.

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Quality

Hot-dip galvanizing is the best corrosion protection - and requires only a minimum of maintenance.

Hot-dip galvanizing is the best corrosion protection - and requires only a minimum of maintenance.

Corrosion protection is a question of trust as only time will tell if the work has been carried out properly. We at DOT vouch for our surface treatment, every time. Hot-dip galvanizing is used for agricultural machines, housing equipment, hardware, wind turbines, facades, balconies, stairways, etc.

There is no better corrosion protection of iron and steel than hot-hip galvanizing. Steel is one of the building blocks in the structures of modern construction where high demands of quality and service lives are crucial.

Hot-dip galvanizing is a process where the item for galvanizing is cleaned of grease, oil, mill scale, rust and other impurities. Hot-dip galvanizing is carried out by immersing the item in one of the largest baths of molten zinc in Northern Europe at 450°C creating a strong, chemical bond between steel and zinc. This creates a strong metallic bond ensuring the durability of the protection and creating a cathodic protection of areas which are not covered by zinc. Unlike paint which adheres to the surface of the steel. This galvanizing creates a hard-wearing and resistant surface with extraordinarily long life and is almost maintenance free.

The hard-wearing galvanizing sustains transport and handling as zinc is a robust material. When the item has been hot-dip galvanized, it is subjected to careful quality controls ensuring the customer the optimum result and service life. DOT’s hot-dip galvanizing and zinc film thickness comply with the quality requirements of ISO 1461.

Capacity

Flexible surface treatment of large and small items - with the same uniform, resistant quality.

Flexible surface treatment of large and small items - with the same uniform, resistant quality.

DOT is able to deliver quantities from very small fittings to huge steel structures of up to 15 tonnes or a length of 22 metres.

With a large lifting capacity above one of the largest zinc baths in Northern Europe, DOT's production equipment is able to handle items and capacities for all customer needs. DOT is also able to deliver items which exceed the bath capacity by using various techniques in the handling phase. 

A solid and resistant design is important to ensure the quality of our hot-dip galvanizing. DOT makes continuous zinc purchases which decides the final price of the design. See the current zinc price at www.boliden.dk.

Our visit to the plant at Vildbjerg has been excellent and provided us with knowledge about the process and the challenges of hot-dip galvanizing.

Jakob Møller,
Foreman, Gøma ApS

Natural and eco-friendly

Zinc is a chemical element occurring naturally in the crust of the earth. Zinc melts at a lower temperature than other metals. As a result, hot-dip galvanizing has similarly lower energy consumption and various other benefits:

  • Extremely long service life
  • Low-cost
  • Minimum maintenance
  • Great finish

Developments in zinc prices

Zinc is part of the hot-dip galvanizing process where the zinc binds to the steel and forms a protective layer. DOT calculates the average zinc price every month which is then used to calculate the zinc regulation. 

The zinc regulation will be made in accordance with the average zinc price in the previous month as noted on the London Metal Exchange (LME). The regulation will be made on the 1st of the month.

Download zinc regulation
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