Corrosion and anti-corrosion issues in gas pipelines

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Corrosion and anti-corrosion issues in gas pipelines: Gas leaks and explosions caused by internal corrosion account for a significant proportion of such incidents; however, applying an inner coating to the pipelines can effectively prevent internal corrosion, thereby enhancing the safety of these pipelines. On the other hand, the efficiency of gas pipeline transportation is one of the key indicators to assess the performance of pipelines in distribution projects after they come online. This efficiency is related to the roughness of the inner surface of the pipelines. The roughness of the inner surfaces of steel pipes produced in China is approximately 0.045 mm. Especially in long-distance natural gas pipelines with high levels of acidic gases, as well as many pollutants and impurities, the transportation efficiency is low after these pipelines are put into use, at around 70% only. Moreover, a rough inner surface facilitates the formation of scale, posing a risk of corrosion beneath that scale. Analysis shows that the most effective way to improve the efficiency of pipeline transportation is to apply a coating of appropriate thickness on the inner wall of the pipe. We call this a \"drag-reducing coating\"; it enhances the surface smoothness and improves the condition of the inner wall of the pipe, allowing its transport capacity to increase by about 10%. The consumption of natural gas in our country is increasing steadily. Anti-friction coatings on pipelines not only bring economic benefits to gas companies but also have certain social benefits.