Effect of temperature and pressure on corrosion behavior of X65 carbon steel in water-saturated CO2 transport environments mixed with H2S. (June 2018)

• Record Type: Journal Article
• Authors: Sui, Pengfei; Sun, Jianbo; Hua, Yong; Liu, Huifeng; Zhou, Mingnan; Zhang, Yucan; Liu, Jiahang; Wang, Yong
• Is Part Of: International journal of greenhouse gas control. Volume 73(2018)
• Page Start: 60
• Page End: 69
• Publication Date: 2018-06
• Subjects: CO2 transport -- Carbon steel -- Corrosion -- H2S -- Thermodynamic model; Greenhouse gases -- Environmental aspects -- Periodicals; Air -- Purification -- Technological innovations -- Periodicals; Gaz à effet de serre -- Périodiques; Gaz à effet de serre -- Réduction -- Périodiques; Air -- Purification -- Technological innovations; Greenhouse gases -- Environmental aspects; Periodicals; 363.73874605
• DOI: 10.1016/j.ijggc.2018.04.003
• Languages: English
• ISSNs: 1750-5836

Abstract

Highlights: Temperature change had a less influence on corrosion rate than pressure change. A thermodynamic model was developed on solubility calculation. H2 S reduced water solubility and took the leading role in degradation process. Corrosion rate of X65 steel had a close correlation with system density. Abstract: The effect of temperature and pressure on corrosion behavior of X65 carbon steel in water-saturated supercritical CO2 containing H2 S was studied to determine the role of H2 S on the corrosion product formation and corrosion mechanism. Weight loss measurements showed that the highest corrosion rate of 0.190 mm/year was recorded at 35 °C and 8 MPa. The presence of 1000 ppmv H2 S resulted in the corrosion products comprised of a double-layer structure in both supercritical and non-supercritical conditions. The results indicated that the presence of 1000 ppmv H2 S has significantly influenced on the corrosion mechanisms, corrosion product morphology and composition as well as promoted the precipitation of water based on thermodynamic model.