On Contribution of Mechanochemical Factor to Rate of Grooving Corrosion of Field Oil Pipelines

Abstract

The results of a calculation analysis of the stress-strain state of a fragment of pipes of four sizes under working pressure are presented in the presence of an oval-shaped longitudinal incision on their inner surface, the appearance of traces of grooving corrosion. It is shown that under the influence of emerging stresses, the maximum value of which is reached in the notch bottom metal, the section of the pipe with an incision is «pressed» into the pipeline and corrodes at an increased speed exceeding the corrosion rate of an intact pipe up to 2.2 times.