The quick steps to repair dry wind turbine blades in winter are as follows:
1. Pockmarks and blisters. Fine blisters and pockmarks can be repaired using the troweling method. First, properly polish the damaged area, then clean it. Apply resin of the same material as the original blade on the damaged area to fill in the blisters and pits. After curing, properly polish the surface to make it smooth and smooth, clean it, and then spray. Gel coat protective layer.
2. The gel coat is darkened and crystallized due to salt spray. When it is found that the outer layer of the gel coat is darkened or crystallized due to salt spray, it is necessary to use a non-ionic surfactant for the first cleaning step. At this time, the active solution can only dissolve the edges of the salt spray and cannot achieve the eradication effect. Only in the first pass can the solution enter the bonding layer between the salt and the leaves to completely remove the salt spray. Therefore, the cleaning of salt spray must be repeated. . When implementing salt spray cleaning of leaves, do not rush for results and allow time for the active agent to dissolve.
3. The gel coat is eroded and peeled off. If the gel coat is eroded and peeled off, you can first properly polish the damaged area, clean it up, apply putty and level it, and then spray the gel coat to repair it.
4. Surface cracks. If the cracks on the surface of the blade are not deep and do not damage the shell, they can be processed according to the procedure (3) above.
5. Drum and polish, remove the damaged parts of the blades, and polish the damaged outer skin by a few centimeters layer by layer, making a rounded transition around the edges.