A comprehensive model for predicting CO2 corrosion rate in oil and gas production and transportation systems

Song, Fang

doi:10.1016/j.electacta.2009.07.087

Cited by 88 publications

(27 citation statements)

References 43 publications

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“…[27][28][29][30][31] To date, most of the mechanistic corrosion rate predictive models [30][31][32][33] base the calculation of the cathodic current (rate of the HER) on studies 14,34,35 where the experimental conditions were significantly different from those encountered in the models' targeted applications. Considering the profound effect of pH, 36,37 electrode material and surface structure, 15,23,34,38,39 overpotential, 40 and solution composition 37 on the kinetics of the HER, a comprehensive understanding of the reaction mechanism and its kinetics is essential for accurate modeling of such systems.…”

Section: H366mentioning

confidence: 99%

Mechanism of the Hydrogen Evolution Reaction in Mildly Acidic Environments on Gold

Kahyarian

Brown

Nešić

2017

J. Electrochem. Soc.

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Despite numerous studies investigating the kinetics of the hydrogen evolution reaction (HER) on a gold surface in acidic solutions, the underlying mechanism of this reaction have remained controversial to date. In the present study, the existing mechanisms are reevaluated and found to be inadequate in explaining the steady state polarization behavior of the hydrogen evolution reaction in an extended cathodic potentials and mildly acidic pH range. It was shown that a mechanism including a surface diffusion step of H ads alongside the Volmer, Heyrovsky, and Tafel elementary steps, best describes the experimental data obtained in acidic perchlorate solutions up to pH 5, while the rate determining step changes both with pH and electrode potential. This overall HER mechanism was further verified using a comprehensive mathematical model based on the proposed elementary steps, where a satisfactory agreement with experimental results was obtained. The hydrogen evolution reaction (HER) has been the subject of numerous studies, either as a platform for investigating the theory of electrochemical processes, 1-9 or in terms of hydrogen production, energy storage, and energy conversion, 10-12 due to its significance in the alternative energy source framework. This trend had also include extensive investigations of the mechanism of the HER on gold in acidic solutions. 6,8,[13][14][15][16][17][18][19][20][21] However, a literature survey shows no general agreement on the underlying mechanism of this reaction to date. [13][14][15]17,18,20,21 Besides, the majority of the proposed mechanisms have been developed based on experimental results obtained in highly acidic environments, 6,8,13-21 but were not examined over an extended pH range.The experimental polarization curves obtained on gold in acidic solutions repeatedly reported to have two distinct Tafel slopes with values in the range of 50-70 mV at lower current densities and 100-130 mV at higher current densities. 3,6,16,18,21,22 A number of different explanations for the underlying mechanism based on these observed Tafel slopes have been proposed in the literature. In a study by Ives 20 in 0.1 N HCl solutions, the author reported polarization curves with an uncharacterized region at low current densities preceding to the 120 mV Tafel slope range. That uncharacterized section of the voltammograms had a significantly lower Tafel slope with values about 50-70 mV, which was extended to the cathodic currents up to about 1 A.m −2 and overpotentials up to about 150 mV. The author associated this lower Tafel slope with the interference of the hydrogen oxidation reaction. 20 However, considering the experimental conditions in that study, no significant interference of anodic currents due to hydrogen gas oxidation is expected, especially at the cathodic overpotentials as high as 150 mV.Bockris et al. 14,23 suggested that the apparent change of Tafel slope to ∼60 mV was caused by the change in potential drop across the diffusion double layer. This effect was believed to be most profoun...

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Section: H366mentioning

confidence: 99%

Mechanism of the Hydrogen Evolution Reaction in Mildly Acidic Environments on Gold

Kahyarian

Brown

Nešić

2017

J. Electrochem. Soc.

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“…where P failure,i is the failure probability of each individual segment as calculated by Equation (11). The evaluation of the complete design used reveals that the component at risk in the wells is the casing, which is composed of N-80 with a 5.5 in (139.70 mm) outer diamater (OD) and a thickness of 6.9 mm.…”

Section: Evaluation Of the Impact Of Corrosion Damage During The Lifementioning

confidence: 99%

“…[4][5][6][7] In particular, the modeling of the corrosion rates in terms of known mechanisms is the subject of numerous publications. [8][9][10][11][12] The models considered were those that take into account the effect of the main variables with a mechanistic approach so to provide a complete description of the contribution of the siderite (FeCO 3 ) layer to the corrosion rates.…”

Section: Stochastic Modeling Of the Probability Density Distribution mentioning

confidence: 99%

Stochastic Approach to the Modeling of CO₂Corrosion

Case¹

2014

CORROSION

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Corrosion assessment is an integral part of predictive maintenance estimations. In such cases, a risk-based approach yields results that can easily be implemented. The results from deterministic (mechanistic or semi-empirical) corrosion models are valid for a "general" rate of dissolution based on the mass and charge balance of an exposed surface; however, they have a limited application in the quantitative assessment of corrosion-related damage. This work introduces a general stochastic algorithm for calculating the carbon dioxide (CO 2 )related distribution of corrosion damage penetration at a given time interval, coupled with corrosion rates predicted by conventional deterministic models. The model is validated by directly comparing the simulation output with actual inspection results from several real cases. The results obtained indicate that the stochastic modeling of CO 2 corrosion based on mechanistic principles allows the assessment of failure probability in a quantitative manner. Additionally, the application of a probabilistic approach in the evaluation of failure likelihood under active corrosion conditions readily simplifies the analysis of the combined effects, such as the inorganic scale deposition, flow, and chemical inhibition.

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“…For the same pH, it is well established that carbonic acid causes greater corrosion than hydrochloric acid. [2,3] Hence, this additional factor in these industries will not only lead to an economic loss but also poses a safety and environmental risk. [4] To curb these adverse effects, several methods were employed in the field to inhibit corrosion of mild steel in these industries and thus controlling the corrosion processes.…”

Section: Introductionmentioning

confidence: 99%

Corrosion inhibition of mild steel byCalotropisproceraleaves extract in a CO₂saturated sodium chloride solution

Ibrahim¹,

Gomes²,

Obot³

et al. 2016

Journal of Adhesion Science and Technology

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a department of chemical engineering, american university of sharjah, sharjah, uae; b centre of research excellence in corrosion, research institute, King fahd university of Petroleum and Minerals, dhahran, Kingdom of saudi arabia; c department of chemistry, Biology and environmental sciences, american university of sharjah, sharjah, uae; d ge Water & Process Technologies, dubai, uae ABSTRACTThe Calotropis procera leaves extract (CPLE) was investigated as a corrosion inhibitor for mild steel in a CO 2 -saturated 3.5 wt% NaCl solution using various electrochemical techniques. The results show that the CPLE is an effective inhibitor with inhibition efficiency of 80% using 50 ppm. Polarization studies show that the CPLE acts as a mixed inhibitor, and the adsorption of CPLE follows Langmuir adsorption isotherm. Molecular dynamics simulations reveal that the presence of N, O in the CPLE as well as π-electron systems coupled with high adsorption energies of interaction of the CPLE with steel are responsible for corrosion inhibition performance.

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A comprehensive model for predicting CO2 corrosion rate in oil and gas production and transportation systems

Cited by 88 publications

References 43 publications

Mechanism of the Hydrogen Evolution Reaction in Mildly Acidic Environments on Gold

Mechanism of the Hydrogen Evolution Reaction in Mildly Acidic Environments on Gold

Stochastic Approach to the Modeling of CO₂Corrosion

Corrosion inhibition of mild steel byCalotropisproceraleaves extract in a CO₂saturated sodium chloride solution

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A comprehensive model for predicting CO2 corrosion rate in oil and gas production and transportation systems

Cited by 88 publications

References 43 publications

Mechanism of the Hydrogen Evolution Reaction in Mildly Acidic Environments on Gold

Mechanism of the Hydrogen Evolution Reaction in Mildly Acidic Environments on Gold

Stochastic Approach to the Modeling of CO2Corrosion

Corrosion inhibition of mild steel byCalotropisproceraleaves extract in a CO2saturated sodium chloride solution

Contact Info

Product

Resources

About

Stochastic Approach to the Modeling of CO₂Corrosion

Corrosion inhibition of mild steel byCalotropisproceraleaves extract in a CO₂saturated sodium chloride solution