Modelling of CO2 corrosion and FeCO3 formation in NaCl solutions

Alsalem, Mustafa M.; Ryan, Mary P.; Campbell, Alasdair N.; Campbell, Kyra Sedransk

doi:10.1016/j.cej.2022.138966

Cited by 14 publications

(15 citation statements)

References 53 publications

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“…Figure shows the relationship between the corrosion rate and P CO 2 effect through logarithmic coordinate, where temperature is in the range of 20–80 °C, flow velocity is 2 m/s, and pH = 4. It is seen that the corrosion rate increases with P CO 2 and that both mostly have a linear relationship, in agreement with the results. ,, The nonlinearity of the curve near 1 bar is caused by ignoring the nonideality of the solution …”

Section: Resultssupporting

confidence: 87%

“…However, some deviation could be found at higher temperatures. It can be explained by the fact that in this work the nonideality of the solution at higher temperatures is not fully considered . The ionic activity in the solution increased with temperature.…”

Section: Resultsmentioning

confidence: 85%

“…It is known that the typical range of pH of CO 2 aqueous solution is from 4 to 7 . Inorganic salts such as HCO 3 – , CO 3 2– , and Cl – contained in the oil and gas may affect the solution pH. ,,,, In addition, pH varies in pipe due to condensate. , The acidity is quite different in industrial cases, so it is necessary to explore the pH effect on the corrosion of mild carbon steel that occurred in the CO 2 –H 2 O system.…”

Section: Resultsmentioning

confidence: 99%

“…It may be due to the fact that the product film caused by corrosion is not considered in this simulation and the film may decrease mass transfer. Unknown ionic interactions in nonideal solutions are not considered …”

Section: Resultsmentioning

confidence: 99%

“…Figure shows the relationship between the average corrosion rate of mild carbon steel in the CO 2 –H 2 O fluid and Reynolds number at different flow rates and temperatures simulated in this work. The consideration of the temperature effect on flow corrosion renders it implausible for the maximum average corrosion rate depicted in Figure to surpass the influence exerted by a single factor (temperature, flow rate) on the pipe corrosion. , …”

Section: Resultsmentioning

confidence: 99%

See 4 more Smart Citations

Investigation of the Working Mechanism of CO₂–H₂O Flow Corrosion of Mild Carbon Steel

Fang,

Zhao,

Wei

et al. 2023

Ind. Eng. Chem. Res.

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In this work, the working mechanism of the CO 2 − H 2 O flow corrosion of mild carbon steel is investigated by a twodimensional simulation. Three models including a mass transfer model, an electrochemical model, and a convection−diffusion model are integrated to study the comprehensive working mechanisms. Several factors including temperature, pH, CO 2 partial pressure, and flow velocity are considered. The results show that the flow corrosion increases with increasing temperature, decreasing pH or increasing CO 2 partial pressure. As the temperature reaches above 60 °C, H 2 O reduction of the cathode becomes significant in the CO 2 −H 2 O flow corrosion. The cathode reaction of the corrosion at low pH is dominated by H + reduction and sensitive to flow velocity, while with the increase of pH, H 2 CO 3 plays an obvious buffer role to supplement H + . The effect of the flow velocity on CO 2 −H 2 O flow corrosion increases with the temperature, where the flow turbulence is found to play an important role in promoting corrosion enhancement.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 85%