GFRP管材在酸性介质中的腐蚀行为及性能研究

发布时间：2018-06-13 03:35

本文选题：GFRP + 酸性介质　；参考：《哈尔滨工业大学》2015年硕士论文

【摘要】：GFRP(Glsss Fiber Reinforced Plastic)是玻璃纤维增强树脂基复合材料的英文简称。由于其具有质量轻、强度高、耐蚀性好、绝缘耐温性能优良等优越的性能,在石油天然气的集输管道领域被广泛用。然而作为耐腐蚀性材料的应用,近年也出现了玻璃钢管道腐蚀破损的情况。因为我国绝大部分油气田输送介质为酸性,而且关于弱酸性介质对玻璃钢管道腐蚀的研究较少,因此进行GFRP管材在酸性介质中的腐蚀行的研究具有十分重要的意义。本文采用石油集输管道中常用的酸酐类玻璃纤维增强环氧树脂管材作为试验研究对象,以吉林油田提供的三种浓度的石油混合液作为腐蚀介质,在实验室条件下通过设定不同的温度、压力及试验周期进行了相关试验。利用Fick模型对材料的吸湿性能进行了理论研究,通过扫描电子显微镜、红外光谱、XPS等分析方法对材料的腐蚀行为进行了表征,并对腐蚀过程中材料性能的演变规律进行了分析。研究表明,酸酐类玻璃钢管材的吸湿性能符合Fick扩散模型,且温度对扩散系数的影响最大。腐蚀过程中,材料表面出现了腐蚀现象,经分析主要是树脂基体发生了一定程度的水解反应,而纤维及界面未出现明显的腐蚀。在本文研究时间范围内,随着腐蚀时间的延长,除硬度之外,材料的密度及力学性能等均呈指数形式下降,并最终接近某一平衡值,这与试验时间有关。因此可以采用力学性能指标进行材料失效与否的评判。
[Abstract]:GFRP Glsss Fiber reinforced Plastics (GFRP) is an abbreviation for glass fiber reinforced resin matrix composites. Because of its light weight, high strength, good corrosion resistance and excellent insulation and temperature resistance, it is widely used in the field of petroleum and natural gas gathering pipeline. However, as a corrosion resistant material, FRP pipes have been corroded in recent years. Because most of the oil and gas field transport medium in China is acidic, and there is little research on the corrosion of GFRP pipe in the weak acidic medium, it is of great significance to study the corrosion behavior of GFRP pipe in acid medium. In this paper, the commonly used acid anhydride glass fiber reinforced epoxy resin pipe is used as the experimental research object, and three kinds of petroleum mixtures of different concentrations provided by Jilin Oilfield are used as corrosion medium. Experiments were carried out under laboratory conditions by setting different temperatures, pressures and test cycles. The hygroscopicity of the material was studied by Fick model. The corrosion behavior of the material was characterized by scanning electron microscope (SEM) and infrared spectroscopy (IR) XPS, and the evolution of the material properties during the corrosion process was analyzed. The results show that the hygroscopicity of FRP pipes is in accordance with the Fick diffusion model, and the temperature has the greatest influence on the diffusion coefficient. Corrosion occurred on the surface of the material during the corrosion process. The main reason was that the resin matrix was hydrolyzed to a certain extent, but the fiber and the interface were not corroded obviously. In the study time range, with the increase of corrosion time, the density and mechanical properties of the material decrease exponentially except hardness, and finally approach a certain equilibrium value, which is related to the test time. Therefore, mechanical properties can be used to judge the failure of materials.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB332

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