OBTAINING ANTI-CORROSION COMPOSITIONS BASED ON SECONDARY POLYPROPYLENE AND POLYETHYLENE TEREPHTHALATE

In the article, the issues of obtaining new anti-corrosion compositions for protecting the bottom of oil storage tanks from corrosion. It is shown that the available domestic materials for the production of anti-corrosion protective coatings have not yet been widely used to protect the equipment of oil production and storage facilities from corrosion. One of the ways to solve this problem is the development of new anti-corrosion compositions based on secondary polymers and some natural resins. The composition of a new composite material for corrosion protection of the bottom of oil storage tanks is proposed. Polymer compositions were obtained by mixing the components in a laboratory multifunctional extruder. Based on spectral studies, a conclusion was made about the structure of the composite, it was shown that the most probable chemical processes occurring in the extruder are the interaction of vinyl acetate with gossypol, its derivatives, as well as molecules of free fatty acids of gossypol resin. The obtained microscopic images of corrosion products on the metal surface of the bottom of the metal of the tank allow us to state that under these conditions, pitting corrosion occurs, the penetration depth of the needle is 4–6 mm/year. The addition of gossypol resin and savilen to the composition of the composite promotes inhibition of the rate of the oxidative degradation process, and additionally increases adhesion to the metal surface by 10-15%. The resulting composition of polymeric anticorrosion compositions based on sevilen, secondary polypropylene, crushed polyethylene terephthalate and gossypol resin is an effective anticorrosion coating and can be used to protect the bottom of oil storage tanks from corrosion.