期刊
CORROSION SCIENCE
卷 129, 期 -, 页码 146-151出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2017.10.005
关键词
Carbon dioxide; Corrosion; Mechanism; Anodic; Carbonic acid; Iron dissolution
资金
- Anadarko
- Baker Hughes
- BP
- Chevron
- CNOOC
- ConocoPhillips
- DNV GL
- ExxonMobil
- M-I SWACO (Schlumberger)
- Multi-Chem (Halliburton)
- Occidental Oil Company
- Petrobras
- PTT
- Saudi Aramco
- Shell Global Solutions
- SINOPEC (China Petroleum)
- TransCanada
- TOTAL
- Wood Group Kenny
The kinetics of the iron dissolution reaction was investigated in CO2-saturated acidic sodium chloride solutions. While the effect of CO2 on the iron dissolution reaction during corrosion process has received little attention in the existing literature, the experimental polarization curves obtained in the present study on X65 mild steel suggest that CO2 and/or its related carbonate species are directly involved in the metal dissolution reaction. The presence of CO2 was found to significantly influence the kinetics and the mechanism of the iron dissolution reaction at partial pressures as low as 1 bar. The higher corrosion rates observed in CO2-saturated brines as compared to strong acid solutions at the same pH could possibly be explained by the effect of CO2 on the kinetics of the anodic reaction.
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