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Coating Protects Rotor Blade Edges

Monday, December 2, 2013

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BASF has announced a new paint designed to protect the edges of wind turbine rotor blades.

RELEST Wind LEP paint is a polyurethane coating that protects the edges of rotor blades from erosion, sand and water.

Wind turbines need to have a service life of 20 years to be economically efficient and need to be protected from the impacts of rain, hail, snow, sand and UV radiation, according to the Ludwigshafen, Germany-based chemical giant.


BASF's new coating, RELEST Wind LEP, is designed to protect the edges of wind turbine blades from a variety of elements.

Wind LEP is part of BASF's RELEST line for coating rotor blades. All parts of the system, which includes gelcoat, putty, edge protection and topcoat, are solvent-free, two-component polyurethane compounds and comply with VOC regulations, according to BASF.

Simulated Testing

According to BASF, RELEST Wind LEP has been put through rain erosion resistance tests and achieved results up to four times better than currently offered coatings. The company tested the coatings at its Oldenburg site with test specimens that rotated on special mounts in a testing stand with speeds of up to 500 km (310 miles) per hour. At that speed, water drops were introduced into the test stand at around 30 liters (8 gallons) per hour so that they hit the test specimens.

"The product has to fit our customers' individual needs," said Dr. Harald Müller, Technology Management for Post-Coatings. "Rotor blade coating is performed in a variety of ways depending on the manufacturer, for instance, by hand with brushes, rollers or spraypainting. The paint can be used with all of these methods."

The paint can also be applied in a wide range of climate conditions. Despite its elasticity, it can be sanded, such as for touch-up work, the company says.

For more information:


Tagged categories: BASF; Erosion; Offshore; Polyurethane; Wind Towers

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