Protectiveness, morphology and composition of corrosion products formed on carbon steel in the presence of Cl−, Ca2+ and Mg2+ in high pressure CO2 environments

This study investigates the individual effects of chloride (Cl−), calcium (Ca2+), and magnesium (Mg2+) ions on the CO2 corrosion behaviour of carbon steel in simulated CO2 geologic storage environments (60 °C and 100 bar CO2). The influence of the aforementioned ions was assessed over immersion times from 6 to 96 h. The corrosion product growth was monitored over this period and related to the extent of both general and localised corrosion. For...