CO2 Corrosion Behavior of X70 Steel under Typical Gas–Liquid Intermittent Flow

Gas–liquid intermittent flow is a kind of pattern that distinguishes itself from the conventional by apparent non-steady feature, which causes serious corrosion issues, including localized corrosion. Although it widely exists in wet gas pipelines, how gas–liquid influences CO2 pipeline steels remains problem to be clarified. In this work, testing device enables good simulation pipelines under various conditions was developed and used perform experimental studies, combining electrochemical tests morphology observations. The result shows velocity ratio act together affect behavior X70 steel typical conditions. has more profound effect on rate, while associated with occurrence discussed.