CO2 loading-dependent corrosion of carbon steel and formation of corrosion products in anoxic 30 wt.% monoethanolamine-based solutions

Zheng, Lirong; Matin, Naser Seyed; Landon, James; Thomas, Gerald A.; Liu, Kunlei

doi:10.1016/j.corsci.2015.09.015

Cited by 44 publications

(27 citation statements)

References 21 publications

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“…MEA solutions with addition of NaHCO 3 (from 0.5 to 1 M), which is consistent with our previous observations that a lower pH is favorable for FeCO 3 formation in a MEA-based solution [9]. In addition, this work provides additional evidence to show how dissolved O 2 participates in the corrosion process in amine solutions for post-combustion CO 2 capture systems.…”

Section: -supporting

confidence: 91%

“…Commonly used amine solutions, such as 5 M monoethanolamine (MEA), become very corrosive after capturing a certain amount of CO 2 under typical operating conditions [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The existence of 4-8% oxygen in flue gas exacerbates the situation by functioning as an additional oxidizer after dissolving in aqueous amine solutions during the capture process and by accelerating degradation of the amines to generate additional corrosive species [4][5][6][7][8][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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Corrosion mitigation via a pH stabilization method in monoethanolamine-based solutions for post-combustion CO2 capture

et al. 2016

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A pH stabilization method was investigated to mitigate corrosion in aqueous 5 M monoethanolamine for post-combustion CO 2 capture. The room temperature pH of a naturally aerated CO 2-loaded solution (i.e., 9.7) was adjusted with NaHCO 3 powders to 9.3 and 9.1, and its effect on corrosion of A106 carbon steel was studied. Lower pH initially accelerated corrosion but promoted protective FeCO 3 layer formation and subsequently A106 passivation (i.e., Fe 3 O 4 formation). Dissolved oxygen also played a pivotal role by functioning as an additional oxidizer, retarding FeCO 3 formation via preferentially oxidizing Fe 2+ to form rust, and promoting passivation of A106 under the FeCO 3 layer.

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Section: -supporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Corrosion mitigation via a pH stabilization method in monoethanolamine-based solutions for post-combustion CO2 capture

et al. 2016

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“…To further understand the corrosion as well as formation of corrosion products, surface characterization by scanning electron microscopy (SEM) and X-ray diffraction (XRD), and solution analysis such as solution alkalinity, CO 2 loading, and pH were carried out. The details of these methods are described elsewhere (Zheng et al, 2014b;Zheng et al, 2016b). Moreover, to better identify the formed corrosion layers on the surface during different steps, the cross-section of corroded samples was prepared and characterized by FEI Helios Nanolab 660 (including focused ion beam (FIB) techniques and SEM characterization, FIB/SEM).…”

Section: Corrosivity Evaluationmentioning

confidence: 99%

“…Simulated speciation of HCO 3 vs. carbon loading in 30 wt.% AMP (red dashed curve) and 30 wt.% MEA (black solid curve, from our previous work(Zheng et al, 2016b)) solutions at 80°C.…”

mentioning

confidence: 97%

Understanding the corrosion of CO2-loaded 2-amino-2-methyl-1-propanol solutions assisted by thermodynamic modeling

Zheng

Matin

Thompson

et al. 2016

International Journal of Greenhouse Gas Control

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Corrosion of A106 carbon steel in a naturally aerated 30 wt.% 2-amino-2-methyl-1-propanol-based solution (AMP, a sterically hindered primary amine) with 0.43 mol CO2 /mol AMP was evaluated at 80°C. Substantial decrease in corrosion rate, i.e., over two orders of magnitude, was observed over the initial 70 h, which is the result of formation of a protective FeCO 3 layer followed by passivation of the A106 surface. Mechanisms for formation of these protective layers are discussed with comparison to corrosion in a 30 wt.% monoethanolamine solution as well as with the help of thermodynamic modeling of the AMP-H 2 O-CO 2 system. Experimental solubility data from literature were employed to extract a thermodynamic model for aqueous solutions of AMP with concentrations ranging from 17.8 to 36.6 wt. % at various CO 2 loadings. Liquid phase speciation was determined by employing an electrolyte-NRTL model. The AMP carbamate stability constant, molecule-ion pair, and molecule-molecule interaction parameters in the studied concentrations were obtained. The determined CO 2 equilibrium properties are in agreement with previously reported experimental data.

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“…The corrosion rate decreased with an increase in immersion duration and temperature. The formed layers of Fe 2 (OH) 2 CO 3 or FeCO 3 on the surface were detected to prevent a corrosion attack [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Monoethanolamine on Corrosion of A283 Carbon Steel in Propionic Acid Solution

Lakkanasri¹,

Lothongkum²

2019

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This research studied the effect of monoethanolamine or MEA on corrosion of A283 carbon steels both in water and 5 vol.% propionic acid solution at boiling point temperature of solution. MEA concentrations ranging from 30 to 90 wt.% in water was used. The 5 vol.% propionic acid containing around 45 and 75 wt.% MEA additions (100:1 and 100:5) by volume in the test solution was studied. The carbon steel coupons were tested in a liquid phase, liquid and vapor phase and vapor phase. The weight losses of coupons were evaluated to calculate corrosion rate. A scanning electron microscope and X-ray diffraction were used to characterize the corrosion surface of coupons. The results showed that the corrosion rate order was in the liquid phase > in the liquid and vapor phase > in the vapor phase. MEA decreased the corrosion rate of A283 carbon steel both in water and 5 vol.% propionic acid solution containing around 45 and 75 wt.% MEA additions (100:1 and 100:5) by volume. MEA can be considered as corrosion inhibitor of carbon steel both in water and propionic acid solution. The formed layers of FeO(OH), Fe2O3 and Fe3O4 on the surface were detected to prevent a corrosion attack. The formed layer of Fe3C was also found and discussed. The more severe corrosion was in ferrite.

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CO2 loading-dependent corrosion of carbon steel and formation of corrosion products in anoxic 30 wt.% monoethanolamine-based solutions

Cited by 44 publications

References 21 publications

Corrosion mitigation via a pH stabilization method in monoethanolamine-based solutions for post-combustion CO2 capture

Corrosion mitigation via a pH stabilization method in monoethanolamine-based solutions for post-combustion CO2 capture

Understanding the corrosion of CO2-loaded 2-amino-2-methyl-1-propanol solutions assisted by thermodynamic modeling

Effect of Monoethanolamine on Corrosion of A283 Carbon Steel in Propionic Acid Solution

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