Magnelis ®
Magnelis® is a metal coating that ensures optimum protection of surfaces against long-term damages.
This coating offers a range of unmatched benefits:
- better resistance to corrosion, up to 10 times higher than any other galvanized steel;
- better protection of surfaces exposed to particularly aggressive environments;
- the best alternative, in terms of costs-benefits, to the post-galvanizing process.
Magnelis® is made using a base of hot galvanized steel, dipped into a bath that contains a special metallic composition of zinc with 3.5% aluminium and 3% magnesium.
This 3% magnesium is crucial, because it creates a stable and resistant layer over the entire metal surface, contributing to a more effective defence against corrosion than a coating with a lower content of magnesium.
Magnelis® is an innovative product that provides better performance than any other galvanized steel.
Main benefits
An alternative to post-galvanising and other metals Magnelis® offers a real advantage over post-galvanised products and even over high value products such as stainless and aluminium.
Depending on the environment to which it is exposed, Magnelis® delivers a significant coating weight reduction of 2 to 4 times less than post-galvanised products, while still performing significantly better in terms of corrosion resistance and cost-effectiveness.
| Salt spray test 2000 hours | |
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| MAGNELIS 20 µm | Post-galvanised 85 µm |
| MAGNELIS® ZM250/20 µm coating | Post-galvanised 85 µm coating |
Superior corrosion resistance
Nothing offers better protection than Magnelis® in chloride or ammonia environments. Due to its unique chemical composition, Magnelis® provides superior corrosion resistance than standard hot dip galvanised steel.
The destruction of coating that occurs in an ammonia environment is seven times less with Magnelis® than with a standard zinc coating. In addition, Magnelis® guarantees a longer-lasting, active coating protection over time. Over an eight-month period, a range of metallic coated products were submitted to salt spray tests. The results clearly highlighted the superior corrosion resistance performance of Magnelis® over other metallic coatings. No red rust was observed on the Magnelis® sample.
N° of hours before appearance of 5% red rust
In highly alkaline environments (pH between 10 and 13),Magnelis® demonstrates superior corrosion resistance compared to other metallic coatings.Due to its chemical composition, the product has better quality characteristics in terms of barrier protection against corrosion in an ammonia environment.
| Salt spray test 20 µm coating per side |
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| MAGNELIS After 34 weeks |
Aluzinc® After 34 weeks |
ZA After 28 weeks |
Zincato a caldo After 6 weeks |
Weight loss in harshest environments
Self-repairing protection on cut edges
In addition to being fortified by a cathodic protection equivalent to zinc coating,Magnelis® protects exposed cut edges with a thin zinc-based protective film with magnesium, which prevents corrosive reactions.
The nature of this film varies depending on the environment and the properties according to the aluminium and magnesium content.
| Outdoor exposure over different time periods of MAGNELIS® ZM250 with 2 mm thickness in Brest (France) |
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| 6 months 30-40% red rust 60% white rust |
16 months |
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Marine category C5-M (the most severe) |
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Environmentally responsible
The application of Magnelis® ensures the preservation of natural resources since it uses less zinc than pure zinc coatings. Moreover, like Aluzinc®, Magnelis® reduces considerably the zinc runoff* in soils.
Zinc runoff rate
* Runoff rate: the rate of dissolution of a material from its surface into the external environment (in g/m2/year). In our case: the quantity of zinc washed from the surface by falling rain water.
