The early stages of FeCO3 scale formation kinetics in CO2 corrosion

Motte, R.A. De; Barker, Richard; Burkle, D.; Vargas, Silvia; Neville, Anne

doi:10.1016/j.matchemphys.2018.04.077

Cited by 79 publications

(40 citation statements)

References 13 publications

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“…The corrosion products are composed of Fe 3 O 4 , Fe 2 O 3 , FeO, FeCO 3 and FeO(OH). The CPS value in Figure 6 and Figure 9 show that FeO(OH) accounts for the largest proportion of corrosion products, followed by FeCO 3 ; thus, the corrosion of steel pipe is controlled by oxygen absorption corrosion [ 30 , 31 , 32 ] and CO 2 corrosion [ 33 , 34 , 35 ]. The presence of H 2 O is a necessary condition that produces FeO(OH) and FeCO 3 [ 36 ].…”

Section: Discussionmentioning

confidence: 99%

Corrosion Failure Mechanism of Associated Gas Transmission Pipeline

et al. 2018

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Corrosion has been responsible for several gas pipeline leakage accidents; thus, clarifying its failure mechanisms is a precondition to prevent such accidents. On the basis of failure analysis of corroded pipe sections, laboratory exposure tests were conducted by simulating three possible corrosion environments inside a gas pipeline. The corrosion rate indicated by depth change was adopted in this study. Scanning electron microscopy and X-ray diffraction were used to analyze corrosion products. Results showed that the specimens completely immersed in condensate water were generally corroded and that the specimens exposed to gas were locally corroded. However, the corrosion rate of the latter was slightly lower; hence, no autocatalysis of occluded corrosion cell occurred in the formation of corrosion pit, and uniform corrosion occurred in the precipitation location of condensate water. The areas in the range of 5 mm below the waterline indicated severe corrosion, and the rate could reach twice that of other areas. The corrosion products were mainly FeO(OH) and FeCO3, thereby proving that the corrosion failure of pipelines was caused by oxygen absorption corrosion and CO2 corrosion. Suggestions were presented to control corrosion failure of associated gas pipelines.

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Section: Discussionmentioning

confidence: 99%

Corrosion Failure Mechanism of Associated Gas Transmission Pipeline

et al. 2018

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“…Early stage corrosion of numerous metals has recently been investigated: tin [26], uranium [27], aluminium [28], magnesium and copper [29]. Corrosion of alloys has also been investigated at initial stages: steel [30][31][32][33][34][35][36], nickel and cobalt superalloys [37], copper-tin bronze [38] as well as zirconium [39], magnesium [40] and aluminum alloys [41,42]. The authors proposed various innovative approaches such as colorimetric indicators [26], strain gauges [30], electrochemical atomic force microscopy [33,34], fiber grating sensor [36], QCN sensors with glued foil electrodes [28], polymer coatings with fluorescence indicators [29], in situ FTIR and Raman spectroscopy [38,39], ultramicrotomy [41], optical probe based on plasmonic nanoparticles [42], radiofrequency wave propagation [43] and electrical resistance sensors [44].…”

Section: Introductionmentioning

confidence: 99%

Early stages of Mg–Nb alloy corrosion in a balanced salt solution – STEM-HAADF and EIS study

Leinartas¹,

Juzeliūnas²,

Staišiūnas³

et al. 2020

chemija

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Thin Mg–Nb alloy films having a thickness below 1 µm were deposited by magnetron sputtering on glass substrates with Nb concentrations of 4, 26 and 32 at.%. Distribution of the elements within the deposits was identified by a scanning transmission electron microscope (STEM) equipped with a high angle annular dark field (HAADF) detector, which showed on a nanometer scale fine Nb-enriched structures. XRD identified nano-crystallinity of the deposits with grain sizes of the order of tens of nanometers. The corrosion behaviour of the films has been studied in a balanced salt solution, whose pH and ion concentrations were close to those of the human blood plasma. The electrochemical impedance spectroscopy implied a localized corrosion with diffusion limitations within a layer of corrosion products. The corrosion rates were determined in situ by Tafel extrapolation and EIS-derived polarization resistance; both methods provided reliable results for corrosion resistant alloy with ca. one third of Nb. Alloying of Mg with Nb makes it possible to adjust the corrosion activity of the alloy according to biomedical requirements for in vivo applications.

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“…However, there is some debate concerning the exact cathodic reaction taking place at the surface. It is generally agreed that the hydrogen reduction reaction (Equation ) is the dominant cathodic reaction at pH range 3–5.5 and the other reactions (Equations ) can be considered to be significant at more basic pH values …”

Section: Introductionmentioning

confidence: 99%

Advantages of asymmetrical over symmetrical cells for detection of under deposit CO₂ corrosion using electrochemical noise

Zeidabadinejad

Shahidi

Foroughi

et al. 2019

Materials & Corrosion

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Electrochemical noise (EN) measurements were done on symmetrical and asymmetrical cells after immersion in 3.5% NaCl solutions saturated with CO2 and containing different concentrations of sodium bicarbonate to get a better interpretation of the under‐deposit corrosion of mild steel. The symmetrical cell was constructed from two sand‐deposited electrodes and the asymmetrical cell was prepared from one sand‐deposited electrode and one bare electrode. The combination of the standard deviation of partial signal (SDPS) plots arising from wavelet analysis and recurrence plots for analyzing the EN signals obtained from symmetrical and asymmetrical cells confirmed the higher detective ability of the asymmetrical cells in comparison with the symmetrical cells for measuring the under‐deposit corrosion of mild steel. Both the SDPS and recurrence plots arising from symmetrical cells showed no significant change in the corrosion severity of the steel alloy with adding sodium bicarbonate. In contrast, the SDPS and recurrence plots of the asymmetrical cells proved that the corrosion severity decreased initially with adding the bicarbonate and thereafter remained constant with increasing the bicarbonate concentration. The optical microscopy images of the sand‐covered electrode surface confirmed the latter result.

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The early stages of FeCO3 scale formation kinetics in CO2 corrosion

Cited by 79 publications

References 13 publications

Corrosion Failure Mechanism of Associated Gas Transmission Pipeline

Corrosion Failure Mechanism of Associated Gas Transmission Pipeline

Early stages of Mg–Nb alloy corrosion in a balanced salt solution – STEM-HAADF and EIS study

Advantages of asymmetrical over symmetrical cells for detection of under deposit CO₂ corrosion using electrochemical noise

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The early stages of FeCO3 scale formation kinetics in CO2 corrosion

Cited by 79 publications

References 13 publications

Corrosion Failure Mechanism of Associated Gas Transmission Pipeline

Corrosion Failure Mechanism of Associated Gas Transmission Pipeline

Early stages of Mg–Nb alloy corrosion in a balanced salt solution – STEM-HAADF and EIS study

Advantages of asymmetrical over symmetrical cells for detection of under deposit CO2 corrosion using electrochemical noise

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Product

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Advantages of asymmetrical over symmetrical cells for detection of under deposit CO₂ corrosion using electrochemical noise