What epoxy resin is used for anticorrosion of pipeline glass fiber reinforced plastics?
3PE has some disadvantages. (1) the bending of the guiding hole and the protruding rock, pebble and gravel in the hole will cause friction and scratch to the relatively soft 3PE corrosion resistant layer. (2) 3PE coating using polyethylene heat shrinkable sleeve joint, the convex part of the concave or lap joint, which makes it easy to travel being scratched or pulled off lead. (2) 3PE corrosion protection layer has a strong electrical shielding, so that the cathodic protection current is difficult to reach the defects of corrosion protection layer, thus causing perforation corrosion.So, from the last century at the beginning of 90s, the United States developed Powercrete (s) Powder Concrete Anticorrosion structure, namely in the bottom of fusion bonded epoxy powder, sprayed with epoxy resin as main film-forming material, and adding a two-component epoxy coating for concrete, polymer concrete curing agent and other inorganic fillers. The coating is tough and wearable and can be used directly in FBE coated pipes to protect the pipe from damage during handling, directional drilling, crossing, etc..
3PE has been anti-corrosion principle, there is no need for anti-corrosion, but now the domestic situation. Directional drilling pipe cannot be detected and repaired, the anticorrosion layer cannot have serious damage to the pipeline, long-term safety operation, it should be required for coating directional drilling: scratch resistance, abrasion resistance, impact resistance, high hardness, strong adhesion and pipeline, corrosion resistance, water resistance have a good soak, matching and cathodic protection system.
General glass fiber reinforced plastic, no corrosion protection.If buried with epoxy coal pitch can be, anti rust grade Sa2.5, six oil four cloth can.
