Journal ArticleDOI
An Electrochemical Model for Prediction of Corrosion of Mild Steel in Aqueous Carbon Dioxide Solutions
TLDR
In this paper, a predictive model was developed for uniform carbon dioxide (CO2) corrosion, based on modeling of individual electrochemical reactions in a water-CO2 system, taking into account the reactions of hydrogen ion (H+) reduction, carbonic acid (H2CO3) reduction, direct water reduction, oxygen reduction, and anodic dissolution of iron.Abstract:
A predictive model was developed for uniform carbon dioxide (CO2) corrosion, based on modeling of individual electrochemical reactions in a water-CO2 system. The model takes into account the electrochemical reactions of hydrogen ion (H+) reduction, carbonic acid (H2CO3) reduction, direct water reduction, oxygen reduction, and anodic dissolution of iron. The required electrochemical parameters (e.g., exchange current densities and Tafel slopes) for different reactions were determined from experiments conducted in glass cells. The corrosion process was monitored using polarization resistance, potentiodynamic sweep, electrochemical impedance, and weight-loss measurements. The model was calibrated for two mild steels over a range of parameters: temperature (t) = 20°C to 80°C, pH = 3 to 6, partial pressure of CO2 (PCO2) = 0 bar to 1 bar (0 kPa to 100 kPa), and ω = 0 rpm to 5,000 rpm (vp = 0 m/s to 2.5 m/s). The model was applicable for uniform corrosion with no protective films present. Performance of...read more
Citations
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Journal ArticleDOI
The influence of microstructure and chemical composition of carbon and low alloy steels in CO2 corrosion. A state-of-the-art appraisal
TL;DR: In this paper, the authors review and discuss the available information about the effect of microstructure and composition of carbon and low-alloyed steel on corrosion resistance in CO2 environments.
Journal ArticleDOI
On the fundamentals of electrochemical corrosion of X65 steel in CO2-containing formation water in the presence of acetic acid in petroleum production
TL;DR: In this article, a conceptual model was developed to illustrate corrosion processes of steel in oilfield formation water system, where the anodic reactions of the steel contain a direct dissolution of Fe, Fe → Fe2+++ + 2e, and the formation of corrosion scale, FeCO3, by Fe + HCO 3 - → FeCO 3 + H+ ++ 2e.
Journal ArticleDOI
Mechanistic modeling of biocorrosion caused by biofilms of sulfate reducing bacteria and acid producing bacteria.
Dake Xu,Yingchao Li,Tingyue Gu +2 more
TL;DR: A mechanistic model that is based on the biocatalytic cathodic sulfate reduction (BCSR) theory and utilizes charge transfer and mass transfer concepts to describe the SRB biocorrosion process is described.
Journal ArticleDOI
Experimental investigation of wellbore integrity and CO2–brine flow along the casing–cement microannulus
TL;DR: In this article, the authors investigate the casing-cement microannulus through core-flood experiments and show that the steel casing reacted to form abundant precipitates of mixed calcium and iron carbonate that lined the channels and almost completely filled a channel.
Journal ArticleDOI
Fe3C influence on the corrosion rate of mild steel in aqueous CO2 systems under turbulent flow conditions
TL;DR: In this article, the corrosion and corrosion inhibition of mild steel in CO2 saturated solutions were studied under turbulent flow conditions at different pH levels, and the corrosion rate always increased with time, behaviour also associated with the presence of Fe3C surface film.
References
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Book
CRC Handbook of Chemistry and Physics
TL;DR: CRC handbook of chemistry and physics, CRC Handbook of Chemistry and Physics, CRC handbook as discussed by the authors, CRC Handbook for Chemistry and Physiology, CRC Handbook for Physics,
Journal ArticleDOI
Physical Chemistry, 2nd Ed.
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