The leading edges of turbine blades take a beating as they sweep through air that is not always clean. Dirt in the air along with crop dust and rain eventually wear the leading edge away, and if it does not receive proper attention, the blade will deteriorate to the point of needing replacement. Coating developer Hontek has developed a new series of blade coating for the wind turbine blades.
The company says the blade coating, ReNEW W-Series, is superior to the tapes and coatings currently available on the market. The W-1100 coating has been rain erosion-tested on whirling arms at 300 mph (135 m/s) in 1 inch per hour rain for 24 hours, with no visible damage on the surface.
ReNEW W-1100 also shows sand erosion resistance when tested at 300 mph (135 m/s), using 177-240 micron sand. The weight loss of W-1100 is 3.5 times less than a well-known competitive coating, which was tested side by side (below-left).
On the ASTM D4060 Taber Abrasion Test, Hontek ReNEW coating showed 11 to 71 times lower weight loss than the current blade coatings on the market.
The Company says ReNEW coating exhibits great resistance to hydrolysis degradation in outdoor humid environments. In an accelerated hydrolysis test, developed by the U.S. Air Force Coating Technology Integration Office, Hontek ReNEW scored the highest on rain erosion and hydrolysis resistance. All other coatings tested by the U.S. Air Force showed signs of coating reversion.
Hontek’s ReNEW Erosion Coatings can be sprayed, rolled, brushed, or cast in mold, suitable for both OEM and field repair applications.
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