Corrosion behavior of L80-1Cr steel as well tubing material for CO2 storage applications

Activity: Talks and presentationsConference presentations

Description

Carbon capture and storage (CCS) is being extensively used to restrict climate change and environmental impacts caused by CO2 emissions. Carbon steel (L80-1Cr) pipelines are most widely used in oil and gas as well tubing material. Corrosion occurs on the steel tubing during the injection and storage of CO2, especially due to the impurities present in the CO2 such as water, H2S, SO2, NH3, O2 etc. and is one of the key challenges in CCS applications. Therefore, it is critical to understand the corrosion behaviour of well tubing material and benchmark the corrosion levels to determine the allowable concentration of various impurities to estimate the integrity and service life of the wells for providing long-term safe storage. In this work, lab-scale parametric experiments were conducted on L80-1Cr specimens in an aqueous CO2-saturated solution at ambient pressure with varying concentrations of different impurities at different temperatures in order to simulate CO2 conditions after injection in CCS applications. The corrosion rate (CR) was determined using conventional electrochemical techniques such as polarization resistance, electrochemical impedance and weight loss measurements using ASTM standards. A flow loop test facility was also used to simulate the actual well conditions and calibrate the corrosion data determined from the lab-scale to actual well conditions. The results illustrated that the CR depends on the impurity levels and temperature, with a sharp increase observed at higher temperatures due to accelerated corrosion kinetics.
Period27 Aug 202331 Aug 2023
Event titleEUROCORR 2023: European Corrosion Congress
Event typeConference
LocationBrussels, BelgiumShow on map
Degree of RecognitionInternational