Preparation And Properties Of Modified Polyurea For Oil Pipeline Anticorrosion

Oil pipelines are the primary means of transporting oil and natural gas across great distances.It is critical to successfully tackle the corrosion problem of long-distance pipes in the pipeline transportation process.The major use of oil pipeline anti-corrosion technology is ecologically friendly,efficient,and cost-effective anti-corrosion coatings,which follow the state’s general trend of supporting low-carbon environmental protection.Due to its green environmental protection and remarkable performance,polyurea elastomer（SPUA）material has become extensively employed in many anti-corrosion protection industries in recent years,and it has great technological and market benefits.Polyurea materials are expected to play a significant role in the field of oil pipeline anti-corrosion.A modified polyurea anticorrosion coating with good mechanical,oleophobicity,and antifouling qualities was investigated in this article.First,to meet the requirements of the mechanical properties of oil pipelines,the types of A component isocyanate and B component chain extender of polyurea coating and the formulation of raw materials were analyzed and compared,and the composition of raw materials was finally determined;at the same time,the mechanical properties were determined.The most optimal process conditions,such as pre-polymerization temperature and duration,were discovered.To improve the polyurea coating’s mechanical characteristics and mechanical strength.The physical modification of the above-mentioned polyurea coatings with activated carbon was examined in this work as a cost-effective modification strategy.The experimental results show that when the addition amount of activated carbon in the B component is 0.8 wt%,the strengthening and toughening of the polyurea coating can be simultaneously achieved,and the increase can reach more than 80%.Finally,in order to enhance the oleophobicity and antifouling properties of the polyurea coating when applied to oil pipelines.On the surface of a polyurea coating structure,1H,1H,2H,2H-perfluorodecyltriethoxysilane（FAS-17）,polytetrafluoroethylene micropowder（PTFE）,and fluorinated Si O₂ were utilized to create a low surface energy multi-component composite.The water/oil contact angle achieves its greatest value when the FAS-17 in the dispersion is 4 wt%and the coarse micropowder particles are 0.75 wt%（where the ratio of PTFE and fluorinated Si O₂ is1:1）,and the polyurea coating is at this time.The amount of oleophobicity and stain resistance has been increased.