... corrosion structure of 3PE layer for the pipeline, the first layer is epoxy powder (FBE>100μm), the second layer is viscose adhesive ( ... AD) 170-250μm, the third layer is polyethylene(PE) 2.5- ... corrosionAnti-corrosion structure of 2PE layer for the pipeline, the first layer is viscose adhesive (AD), the second layer is polyethylene(PE), two ...