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Journal ArticleDOI

An Electrochemical Model for Prediction of Corrosion of Mild Steel in Aqueous Carbon Dioxide Solutions

01 Apr 1996-Corrosion (NACE International)-Vol. 52, Iss: 4, pp 280-294
TL;DR: 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...

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Citations
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Journal ArticleDOI
TL;DR: In this article, a review summarizes the corrosion inhibition of steel materials in acidic media, focusing on HCl solutions, lower-grade steels, and elevated temperatures, and also devoted to corrosion inhibitor formulation design.

927 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of dissolved carbon dioxide on the electrochemical reactions of two pipeline steels: a low alloy steel and a 13% Cr stainless steel were investigated, and the role of pH buffer and electrolytic anion was discussed, and it was shown that at high cathodic overpotentials the carbon component of the dissolved CO2 is reduced, probably to carbon monoxide, and this reduces the rate of hydrogen evolution by cathode poisoning.

303 citations

Journal ArticleDOI
TL;DR: In this article, the corrosion inhibition and adsorption behavior of 2-undecyl-1-ethylamino imidazoline (2UEI) on N80 mild steel in CO2-saturated 3% NaCl solutions was investigated using potentiodynamic polarization, electrochemical impedance spectroscopy techniques and SEM observation.

239 citations


Additional excerpts

  • ...However, significant progress has been achieved in understanding the mechanism of CO2 corrosion in the oil and gas industry [7,12–18], but an understanding of its inhibition mechanism and the kinetics of the inhibition process necessary to quantify formulations that will provide a desirable level of protection, remains incomplete....

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  • ...Similar observation has been made by previous researchers [14,32] and the behaviour attributed to the increase in HCO 3 ions with pH which saturates the surface of the metal and thus inhibits the transport of the Fe ion from the metal lattice....

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  • ...[37] and in CO2-saturated solutions [14]....

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Journal ArticleDOI
TL;DR: A review of surfactants as corrosion inhibitors is designed to provide systemic evaluation of various physical and chemical properties, surfactant behaviors in corrosive environments, and their influence in corrosion inhibition.

232 citations

Journal ArticleDOI
TL;DR: In this article, the effect of the addition of benzimidazol as a corrosion inhibitor has also been analyzed by means of scanning electron microscopy (SEM), electron dispersive X-ray (EDX) and Xray photoelectron spectroscopy (XPS).

224 citations

References
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Book
01 Jan 1973
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,
Abstract: CRC handbook of chemistry and physics , CRC handbook of chemistry and physics , کتابخانه مرکزی دانشگاه علوم پزشکی تهران

52,268 citations

Journal ArticleDOI

602 citations


"An Electrochemical Model for Predic..." refers background or result in this paper

  • ...Tafel Slope — From the experiments, bc for H2CO3 reduction in Equation (26) was found to be similar to that for H+ reduction (≈ 120 mV/decade at 20°C), which was in agreement with deWaard and Milliams....

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  • ...11 Exchange Current Density — For tref = 20°C, the exchange current density for H2CO3 reduction in Equation (26) has a similar value as the one for H+ reduction iref o(H2CO3) ≈ 6 x 10–2 A/m 2....

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Book
01 Jan 1993
TL;DR: In this article, a rigorous outline of the basic concepts forming the subject matter of modern theoretical and applied electrochemistry, originally published in Russian in 1988 by Khimiya Press, Moscow.
Abstract: A rigorous outline of the basic concepts (phenomena, processes, laws) forming the subject matter of modern theoretical and applied electrochemistry, originally published in Russian in 1988 by Khimiya Press, Moscow. In the present English edition three supplementary chapters have been added, on photo

424 citations

Journal ArticleDOI

245 citations

Book
01 Jan 1972

213 citations