Wind Turbine Blades

KHIA ID: 9436

Industry: Power (POWR)
Application: FBC-Fans, Blowers and Compressors (FBC)
Substrate: GFRP

Customer Location: Denmark
Application Date: September 2023

Products: Belzona 5711, Belzona 5721

Problem: Due to natural wear and weathering, 14 onshore wind turbines where exhibiting damaged leading edges. The turbines were outside of the Manufacturer's warranty period.

Damaged leading edge

Wind turbine in need of repair and protection

Application of Belzona 5711 and Belzona 5721 completed

Application Situation

Previously, the Customer had used pre-formed shells that were bonded onto the substrate, but the process was time-consuming and expensive. Therefore, the Customer was seeking an alternative solution which would ensure optimal operation for many years to come.

Application Method

Surface preparation was carried out, followed by the direct application of 90 kg (198.4 lbs) of Belzona 5711 from self-mixing cartridges onto the blade. The repair area was contoured using a piece of Belzona mixing board. Once cured, a visual inspection was conducted to ensure the application’s readiness for overcoating with 144 kg (317.5 lbs) of Belzona 5721. Using a short-bristled brush, this system was then applied to the leading edge and left to cure. The application was carried out in accordance with Belzona System Leaflet FBC -16.

Belzona Facts

The Customer chose Belzona 5711 and Belzona 5721 on the basis of our test results, ease of application, high-quality finishes, and after stress testing the product itself. The unique selling point was that it is a quick and durable solution which offers a short downtime period.

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