Talk about the corrosion of oil pipelines

Thread Content

Let’s talk about the corrosion of oil pipelines. Oil contains a large amount of organic and inorganic substances such as alkanes, cycloalkanes, and aromatic hydrocarbons; therefore, the mechanisms of corrosion and the methods for protecting oil pipelines are more complex compared to those used for water pipelines. Oil products are contaminated with gases such as CO2, H2S, and SO2; when these gases dissolve in water to form carbonic acid and sulfuric acid, they cause acid corrosion. Sediment in oil products can erode pipelines during transportation, damaging the passivation layer on their walls and causing wear and corrosion. The combined effects of dissolved oxygen in the oil, microorganisms such as sulfate-reducing bacteria, as well as changes in temperature, pressure, flow rate, and flow pattern, can also cause severe corrosion in pipelines.