Patent ID: 8603628

Claim:
A turbine blade comprising: a blade having a trailing edge and a leading edge and having a front surface and a back surface; and a multilayer polymer film disposed over at least a portion of the blade, the multilayer polymer film comprising: a first layer including an acrylic-based adhesive; a second layer disposed over the first layer, the second layer comprising a blend of an acrylic polymer and a fluoropolymer; and a third layer disposed over the second layer, the third layer including a fluoropolymer; wherein the multilayer polymer film forms an outer surface having a smooth surface region and a patterned surface region, the smooth surface region having a surface roughness (Rz) of not greater than 10 microns and the patterned surface region having a surface roughness (Rz) of at least 50 microns, wherein the patterned surface region extends from the front surface over the trailing edge of the blade to the back surface.