Corrosion behaviour of low-alloy martensite steel exposed to vapour-saturated CO2 and CO2-saturated brine conditions. (20th September 2016)

• Record Type: Journal Article
• Authors: Liu, Zhenguang; Gao, Xiuhua; Li, Jianping; Du, Linxiu; Yu, Chi; Li, Ping; Bai, Xiaolei
• Is Part Of: Electrochimica acta. Volume 213(2016)
• Page Start: 842
• Page End: 855
• Publication Date: 2016-09-20
• Subjects: Corrosion -- Low-alloy steel -- Martensite -- Carbon dioxide corrosion; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.08.024
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: This work utilizes immersion experiments to investigate the CO2 corrosion behaviour of low-alloy martensite steel by analysing its microstructure, corrosion kinetics, corrosion phases, surface morphology, cross-section morphology and elemental distribution. The experimental results show that the designed steel is free of localized corrosion and that its corrosion rate in vapour-saturated CO2 conditions is lower than that in CO2 -saturated brine conditions. The inner layer consists of FeCO3 crystals and Cr-rich compounds, which plays a crucial role in the corrosion behaviour of the designed steel immersed in CO2 -saturated brine conditions. The corrosion processes of the low-alloy martensite steel immersed in vapour-saturated CO2 and CO2 -saturated brine conditions are proposed according to the experimental results. Additionally, the microscopic corrosion process of steel materials with a martensite microstructure is presented.