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Surface Coating;

DV-B Slewing bearings have a high surface quality before shipment and are normally not subject to any further surface treatments. However, slewing bearings can be coated to ensure an even higher surface protection. The range of protections spans from simple corrosion protection coatings to multilayer coating systems in compliance with guidelines for coating thickness, RAL-colour numbers and more. As an alternative to painting systems slewing bearings can be supplied with yellow-chromated surface protection. A passivation layer of a few microns only is formed on the surface, having a good corrosion protection effect without influencing the dimensions significantly. A particular feature is the zinc flame-sprayed surface coating. The layer of zinc that is applied protects the slewing bearing for a very long period of time, even with adverse ambient conditions, and is often applied to slewing bearings on wind turbines and offshore constructions.