News –

Drives from NORD with nsd tupH surface treatment

Robust and reliable – even under extremely harsh conditions. In his processing centre, Dutch mussel processor Krijn Verwijs relies on corrosion-resistant drive solutions from NORD.


Bargteheide , 2018-04-03

Hundreds of 1.5 kW geared motors keep the conveyor belts moving at Krijn Verwijs ’ shellfish processing centre. The salt-laden air made conventional drives reach their limit rather fast. Brand-new cast iron geared motors showed first signs of rust after just a few weeks. And they only lasted about two years before they had to be replaced. Even good protective coatings or painting could not significantly delay the start of corrosion under these aggressive ambient conditions. Stainless steel didn’t prove to be a reasonable alternative either because the drives turn very hot and require a long cooling phase before they can be cleaned.

The solution: NORD aluminium drives with nsd tupH surface treatment . For the nsd tupH treatment, no material is applied – so that nothing can flake off. Instead, the surface treatment creates a base layer which is permanently bonded to the substrate. On the basis of an electrolytic process, this treatment gives aluminium housings a similar corrosion resistance to that of stainless steel. The scratch-proof surface is also six times harder than the untreated aluminium alloy and a thousand times harder than paint.

Purchase costs for aluminium systems with nsd tupH surfaces may be higher compared to those of conventional drives made from cast iron, but this is made up for by a much longer service life. In addition, costs for replacement motors and the resulting considerable installation efforts are eliminated. Bram de Visser, service manager at Krijn Verwijs: “With the new NORD solution, we no longer have to keep worrying about the drive systems. We are expecting the drives treated with nsd tupH to last at least five times longer than the old geared motors."

The nsd tupH treatment is available for all NORD products made from aluminium.

AT A GLANCE: Advantages of nsd tupH

  • Corrosion-resistant
  • Resistant to acids and alkalis
  • Easy to clean
  • Durability similar to that of stainless steel
  • Cannot flake
  • Lighter than stainless steel
  • Cost-effective alternative to stainless steel
  • Ability to dissipate heat more effectively than stainless steel