Внутрішньотрубна корозія промислових газопроводів

Abstract

One of the least studied is corrosion under the influence of gas hydrates. The ability to form hydrates with many gases, volatile organic liquids and their binary and multicomponent mixtures. Hydrates can initiate certain types of internal corrosion of pipelines. This relates to corrosion pitting, which is often seen as a fresh, and in the acidic environment. This corrosion is difficult to detect, prevent or predict the stage of construction of the pipeline. Analyzes assortment of pipe steels and selected for experimental studies of the impact of gas hydrates on the internal surface of the pipeline samples cut from steel 20 and 16HS tubes. Established real physical and mechanical properties of steel pipe and show that they are in some indicators 20-30% lower than given in the certificate, due to the influence of the mode of production of seamless steel pipes.Studied domestic and international experience in the field of corrosion protection of internal surfaces of pipes. Systematized by structural type of hydrate formation and corrosion inhibitors. Special attention require interaction between the components of corrosion inhibitors and inhibitors of hydrate formation in order to optimize their choices and achieve maximum synergistic effect.