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Metallization Haringvliet bridge with EDCO Metalspray EQ - A sustainable choice

The Haringvliet bridge is an important part of the infrastructure in the Netherlands, serving thousands of vehicles and travelers every day. After many years of use and exposure to weather and salt water, the bridge was due for renovation to ensure safety and durability. One of the techniques applied during the renovation of the Haringvliet bridge (valve) was metallisation.

In this blog we discuss what metallization is, how it works, and why it is a good choice for the renovation of the Haringvliet bridge.


Metallization is a surface treatment technique in which a layer of molten Zinc/Aluminium (85/15) is applied to a surface.

This layer is applied using a thermal spray process, in which the Zinc/Aluminium is sprayed onto the surface in a liquid state. This results in a protective layer that protects the surface against corrosion for at least 30 years.

The metallization layer is more durable than most traditional coatings, providing better protection against corrosion. This is especially important for structures that are subject to harsh conditions, such as bridges and offshore installations.

How does metallization work?

The metallization process starts with preparing the surface to be treated. This includes cleaning the surface by blasting to remove dirt, rust and other impurities.

The Zinc/Aluminium is then heated by means of a flame spray gun to a liquid state and it is sprayed onto the surface at high speed. The metal particles adhere to the surface and form a protective layer that protects the surface against corrosion. After applying the Zinc/Aluminium, the layer can be finished with a coating of any desired color.

Why metallizing is the best choice for the renovation of the Haringvliet bridge.

The Haringvliet bridge is exposed to severe weather conditions and salt water, which leads to corrosion on all surfaces. To ensure the safety and durability of the bridge, an effective surface treatment was necessary.

Metallizing was chosen because it is an effective and durable solution for surface treatments.

Metallizing offers several advantages over other surface treatment techniques. It offers excellent protection against corrosion and wear, even in harsh conditions such as those near the Haringvliet bridge. A very durable solution that lasts for many years without maintenance.

In addition, metallization is a sustainable option for surface treatments. The metal used in metallization is 100% recyclable and almost no waste is produced during the process.

Cost savings for the future

Make up for 30 years today...

Of course, closing the bridge for months has a lot of collateral damage financially, in addition to the costs of this major renovation itself. Both for transport companies and companies that depend on delivery via the Haringvliet Bridge as well as the inconveniences and costs of traffic diversions. Plus their impact on the environment.

Metallizing offers a more sustainable solution than traditional coatings. A metallization layer lasts much longer than just a paint coating. Because the Zinc/Aluminium is much more resistant to corrosion. As a result, less maintenance is required and the layer needs to be replaced less often. A cost saving on all fronts for years to come.

Edco Metalspray Equipment

Our further developed technology EDCO Metalspray Equipment makes it possible to sustainably preserve even very large objects and surfaces.

With this we have realized a handy machine for all applications. This makes the application possibilities of metallization even greater than it already was.

Our machines create little dust and guarantee 90% efficiency. In addition to your material, extraction costs and dust waste, you also save considerably on man hours.

Would you like to know what we can do for your project?

We would be happy to advise you without obligation.

Every project has its own challenges and solutions!

We can be reached at or contact us on +31 (0)76 543 08 28

or visit to see what we can do for your project.

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