«Environmental protection in oil and gas complex»

Assessment of the equipment and gas pipelines reliability in conditions of transportation and injection of corrosively-dangerous CO2

UDC: 628.5:504.054
DOI: -

Authors:

¹ Gazprom VNIIGAZ, Razvilka settl., Moscow region, Russia
² Bauman Moscow State Technical University, Mytishchi, Russia

Keywords: carbon footprint, carbon dioxide, decarbonization, corrosion rate, carbon dioxide corrosion, local defects, carbon and low-alloy steel, corrosion protection, corrosion product, utilization, storage

Annotation:

The authors of the article present the data of studying the corrosion hazard of facilities for transporting excess of CO2 captured for injection and storage in underground tanks (carbon capture, utilisation and storage, CCUS). According to the results of simulation tests carried out by "Gazprom VNIIGAZ" LLC, the operating conditions of pipelines and equipment involved in pumping and injection of CO2 into storage areas are determined as corrosive-aggressive will be corrosive and during moisture condensation and alternating wetting of the pipe for carbon and low-alloy steels will be created conditions for the development of carbon dioxide corrosion with its local manifestations. Corrosion rates, especially local one, will be significantly higher than 0.1 mm/year, which is boundary value. To ensure reliable and trouble-free protection of gas pipelines and equipment being in contact with the pumped CO2 medium, there required the selection and obligatory use of protective equipment (corrosion-resistant materials, corrosion inhibitors or metal coatings).

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