Effect of CO₂ on the Permeation of Hydrogen in Carbon Steel in H₂S Environment

Abstract:

The effect of CO₂ on the hydrogen permeation behaviour of carbon steel was investigated in a high temperature and high pressure hydrogen permeation device, through hydrogen permeation test, weight loss test, hydrogen content test, and SEM-EDS. The results showed that the peak value of the hydrogen permeation curves were almost the same with or without CO₂, but the hydrogen permeation curve rose sharply, and then decreased gradually to a stabilized current value in H₂S/CO₂ environment, which was lower than in H₂S environment. The corrosion rates and the amount of hydrogen of steel in H₂S/CO₂ environment were lower than in H₂S environment. Therefore, it is considered that CO₂ has an effect on the hydrogen permeation in H₂S, mainly due to the change of corrosion products.

• Periodical: Materials Science Forum (Volume 847)
• Pages: 490-496
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.847.490
• Online since: March 2016
• Authors: Peng Peng Bai, Yu Xuan Liang, Li Wei Liu, Cheng Shuang Zhou, Shu Qi Zheng, Chang Feng Chen
• Keywords: CO₂, Corrosion, H₂S, Hydrogen Permeation, Steel

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