Duplex system

The zinc layer bonds to the steel chemically. The zinc alloy is hard, wear- and chip-proof, and can cope well with mechanical loads. The powder coating is elastic, wear-, impact- and chip-proof, and can cope well with chemical loads. The Duplex system provides protection for 2.5 times as long as the total protection provided separately by galvanising and powder coating. The Duplex system is the most durable form of protection in extreme weather conditions and in the fight against steel corrosion.

The uniform quality of the Duplex system is safeguarded in accordance with NEN 5254 and NEN-EN 15773. These standards sets out the quality requirements for the application of organic coatings on hot-dip galvanised products (the Duplex system).

Hot-dip galvanising and powder coating provide perfect and durable protection for steel. Galvanised and powder coated materials are extremely resistant to mechanical and chemical loads. They are virtually maintenance-free, they are scratch- and impact-resistant, easy to clean and highly resistant to UV radiation. The price-quality ratio of the Duplex system is excellent, particularly in the long term.

During the powder coating process, the powder is applied electrostatically. No solvents are needed. Powder coating does not produce any hazardous fumes and there is no fire risk. Nor are there any harmful residues. Powder that does not adhere to the material is used again.

No material is lost when hot-dip galvanised products are ultimately replaced. The steel and the zinc are recovered and can be used again. The useful life of certain products can be extended considerably by degalvanising and regalvanising them. The small quantity of zinc that is lost enters the cycles of life as an essential element, playing a useful role there also.