Abstract

Natural gas is an important energy in China's production and life. In the environment of advocating low-carbon life, natural gas is an important part of low-carbon energy. But what does not match with the demand is that the development technology of natural gas in China is relatively backward, and the most prominent one is the gas leakage phenomenon of natural gas pipeline. The aging and corrosion of natural gas pipelines often lead to more serious safety problems. At present, the main solution is to coat the natural gas pipeline with anti-corrosion materials, but the effect is not satisfactory because of the uneven quality of the materials. In order to solve this problem, the preparation method of nanocomposite inner coating and its application in natural gas pipeline are studied in this paper. Firstly, this paper focuses on the application of nano materials and nano composite materials in the field of anti-corrosion coating, and analyzes the physical benefits of materials. It is considered that the protective mechanism of the nanocomposite anticorrosive coating is mainly through the adhesion of the coating to the metal substrate, the mechanical isolation of the corrosive medium, the formation of passive protective film and electrochemical protection on the metal surface. In order to further analyze the specific effect of nanocomposite coating, the corresponding experimental model is established in this paper. Many comparative experiments including tensile property analysis, particle size analysis, hydrophobic property and DSC were carried out. It can be seen from the experimental data that the nano composite anti-corrosion coating performs well in the experimental test and has good corrosion resistance, but both the tensile property and hydrophobicity are related to the degree of hard segment. According to the comprehensive analysis, the nanocomposite inner coating is suitable for the weather pipeline, which is recommended to be popularized.

摘要

天然气是我国生产生活的重要能源。在倡导低碳生活的环境中，天然气是低碳能源的重要组成部分。但与需求不匹配的是，我国天然气开发技术相对落后，最突出的就是天然气管道漏气现象。天然气管道的老化和腐蚀往往会导致更严重的安全问题。目前主要的解决办法是在天然气管道上涂上防腐材料，但由于材料质量参差不齐，效果并不理想。针对这一问题,本文对纳米复合内涂层的制备方法及其在天然气管道中的应用进行了研究。首先，本文重点介绍了纳米材料和纳米复合材料在防腐涂料领域的应用，分析了材料的物理效益。认为纳米复合防腐涂层的保护机制主要是通过涂层对金属基体的粘附、腐蚀介质的机械隔离、钝化保护膜的形成和对金属表面的电化学保护。为了进一步分析纳米复合涂层的具体效果，本文建立了相应的实验模型。进行了许多对比实验，包括拉伸性能分析、粒度分析、疏水性能和DSC。从实验数据可以看出，纳米复合防腐涂层在实验测试中表现良好，具有良好的耐腐蚀性能，但拉伸性能和疏水性均与硬链段的程度有关。综合分析，纳米复合内涂层适用于气象管道，推荐推广。