油管内壁耐温耐磨涂层材料的研制及性能研究

Preparation and Performance Study of Temperature-Resistant and Wear-Resistant Coating Material for Inner Wall of Oil Pipes

针对我国油气传输管道在高温高压(150~200℃,34~36 MPa)服役条件下的磨损腐蚀问题,以无溶剂环氧树脂体系为基础,通过固化剂及填料筛选、配方正交设计及黏度影响因素研究,研制了适用于油管内壁综合性能良好的耐温耐磨涂层材料。涂层采用固化反应温度更高以及力学性能更好的0421型固化剂,选择碳化硅、碳纤维和聚四氟乙烯作为填料,研究不同粒径的填料所制备涂层的力学性能和黏度,发现当碳化硅粒径为18μm,碳纤维粒径为75μm时,涂层力学性能更佳且黏度更低,同时通过正交试验确定了碳化硅、碳纤维和聚四氟乙烯的最佳用量分别为占树脂总量的30%、10%、5%,并在涂料体系黏度影响因素研究中发现聚四氟乙烯对体系的黏度影响最大。以上述试验为基础,最终研制出的涂料及涂层各项性能达到技术指标要求。

Aiming at the abrasion and corrosion problems of China pipelines that transported oil and gas in working conditions with high temperature and high pressure(150~200 ℃, 34~36 MPa), based on the solvent-free epoxy resin system, a temperature-resistant and wear-resistant coating material suitable for the inner wall of oil pipes with good comprehensive performance was developed through the selection of curing agents and filler, the orthogonal design of the formulation and the research on viscosity influencing factors. 0421 curing agent with higher curing temperature and better mechanical properties was adopted, and SiC, carbon fiber and PTFE were selected as fillers. The research of the mechanical properties and viscosity of the coating with different size fillers was conducted. Results showed that when the size of SiC was 18 μm and the size of carbon fiber was 75 μm, the coating had better mechanical properties and lower viscosity. Through orthogonal experiments, it was determined that the best dosages of SiC, carbon fiber and PTFE were 30%, 10% and 5% of the total resin, respectively. In the research on the viscosity influent factors of the coating system, it was found that PTFE had the greatest influence on the viscosity of the coating system. Based on the above tests, the coating was finally developed and its properties met the technical index requirements.