The second is the cold wrapping method of polyethylene adhesive tape. The anti-corrosion form is also called cold wrap. This method does not require heating in the operation process, first apply epoxy primer evenly by hand, and then use a manual winding machine for spiral winding and lapping. The coverage rate is more than 50%, and the thickness of the anti-corrosion layer after lapping is generally more than 2.2mm. Affected by the anti-corrosion material, the adhesive layer and primer are not easy to stick firmly, and the peeling strength is low, which is 20/cm. The anti-corrosion layer is prone to damage or extrusion deformation, and the bonding part of the bond is not strong after exposure to the wind and sun, and the anti-corrosion layer is empty or warped.