Investigation of crevice corrosion susceptibility of L80-13Cr in CO2 solution containing SO2

Abstract

Based on the potential risk of crevice corrosion in the casing during CO₂ injection and storage, this study investigated the crevice corrosion susceptibility of L80-13Cr steel in CO₂-saturated NaCl solutions with different SO₂ concentrations and pH. It was found that crevice corrosion didn't occur without SO₂, while the introduction of SO₂ led to crevice corrosion. Electrochemical techniques were employed to study passivation characteristics, which observed that the addition of SO₂ altered the passivation behavior. The formation of the passivation film was hindered, and the passivation film stability was reduced by the addition of SO₂, especially at higher chloride ion concentrations.