Methodology for studying the corrosion of material of oil pipelines operating in marshy soil

Abstract

Abstract The main reason for the operation of oil pipelines is the corrosion of their materials. As a result of corrosion, the destruction of the pipeline, contributing to the leakage of oil, which pollutes the environment, accidents and disasters. The most corrosive areas are areas of high humidity, for example: swamps. In the Russian Federation, about 30 % of the transport network of oil pipelines passes through swampy soil. As the materials of oil pipelines, pipe steels are used, for example Steel of type 3 or 09Mn2Si. The article describes a method for studying the corrosion rate of pipe steels on a laboratory bench that simulates their operation in marshy soil. A comparison is made of the corrosion mechanisms of 09Mn2Si and Steel of type 3 steels in soils with a high content of hydrogen sulfide and the presence of microorganisms by empirical tests based on the above method. The results of gravimetric tests were evaluated and the conclusions were discussed.