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采用硅氧烷的复配物作为改性剂,使天然气管道内壁表面形成致密的超疏水分子膜,以达到管道防腐的目的。从天然气管道上取得管材试样,对改性前后的试样表面进行红外光谱和接触角测试,利用不同酸度值的5%NaCl和5%NaCl-HCl水溶液,对改性前后的管道内壁表面进行腐蚀实验。结果表明:天然气管道内壁表面由多种FeOOH、α-Fe2O3、FeCO3及少量Fe3O4组成;改性后,管道内壁表面与硅氧烷发生化学反应,复配物的碳链分子以化学键形式与管道内壁表面联接,形成超疏水分子膜,接触角大于160°,具有良好的防腐性能。硅氧烷复配物易于雾化,在湿气输送管道及其他具一定湿度的天然气管道内壁缓蚀或防腐上,具有一定的发展潜力。
Silicone compound as a modifier, the natural gas pipeline wall surface to form a dense superhydrophobic molecular film, in order to achieve the purpose of pipeline corrosion. Pipe samples were taken from the natural gas pipeline, and the surface of the sample before and after modification was tested by infrared spectroscopy and contact angle. The surface of the inner wall of pipeline before and after modification was treated with 5% NaCl and 5% NaCl-HCl aqueous solution with different acidity Corrosion experiment. The results show that the inner wall surface of natural gas pipeline consists of many kinds of FeOOH, α-Fe2O3, FeCO3 and a small amount of Fe3O4. After the modification, the inner wall surface of the pipeline reacts chemically with the siloxane. The carbon chain molecules of the complex chemically bond with the inner wall of the pipeline Surface connection, the formation of superhydrophobic molecular film, the contact angle greater than 160 °, with good corrosion resistance. Silicone compounds are easy to atomize, and have certain potential for development in the corrosion resistance or corrosion resistance of moisture pipelines and other natural gas pipelines with certain humidity.