On the theory of CO2 corrosion reactions – Investigating their interrelation with the corrosion products and API-X100 steel microstructure

Eliyan, Faysal Fayez; Alfantazi, Akram

doi:10.1016/j.corsci.2014.04.055

Cited by 73 publications

(39 citation statements)

References 69 publications

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“…The galvanic coupling between carbides patched and the fresh steel substrate could build up immediately, promoting the dissolution of Fe [3]. The Fe 3 C acts as a cathodic site, and the rate of cathodic reaction on Fe 3 C is higher than that on iron [17,20,39]. So, the rate of cathodic reaction on carbides in the tested steel may be higher.…”

Section: Corrosion Mechanismmentioning

confidence: 92%

“…Therefore, it is reasonable for the presence of spherical Ti-rich carbides. The previous experiments show that microstructure plays a special role on carbon dioxide corrosion behavior [16,17,19,21], so the microstructure morphology characteristics in the tested steel could influence the carbon dioxide corrosion behavior of tested steel at vapor-saturated CO 2 and CO 2 -saturated brine conditions, which will be interpreted in this paper.…”

Section: Microstructurementioning

confidence: 98%

“…Furthermore, several corrosion mechanisms have been postulated for P/F steel and TM steel, and the role of cementite (Fe 3 C) and carbides in steel on carbon dioxide corrosion varies with different microstructures. The ferrite microstructure, which has a higher tendency to form thick corrosion film, dissolves at higher rates than acicularferrite and martensite microstructures, which are intrinsically less reactive [17]. In P/F steel, ferrite dissolves rapidly while lamellar cementite phase itself is unaffected.…”

Section: Introductionmentioning

confidence: 97%

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Corrosion behavior of low-alloy steel with martensite/ferrite microstructure at vapor-saturated CO2 and CO2-saturated brine conditions

Liu

Gao

et al. 2015

Applied Surface Science

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Section: Corrosion Mechanismmentioning

confidence: 92%

Section: Microstructurementioning

confidence: 98%

Section: Introductionmentioning

confidence: 97%

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Corrosion behavior of low-alloy steel with martensite/ferrite microstructure at vapor-saturated CO2 and CO2-saturated brine conditions

Liu

Gao

et al. 2015

Applied Surface Science

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“…[4][5][6][7] FeCO 3 can develop as an amorphous or crystalline structure; in the latter case, it forms as a crystalline system which is identical to calcite scale 8 especially when both pH and temperatures are high. [9][10][11] FeCO 3 can reduce the corrosion rate (CR) to values that are 10 times lower, 12 when compared to the CR achieved when common CI are administered (Supplementary Table S1) but thus far, there has been no attempt to chemically modify its structure or adapt its density in-situ.…”

Section: Introductionmentioning

confidence: 99%

Siderite micro-modification for enhanced corrosion protection

et al. 2017

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Production of oil and gas results in the creation of carbon dioxide (CO2) which when wet is extremely corrosive owing to the speciation of carbonic acid. Severe production losses and safety incidents occur when carbon steel (CS) is used as a pipeline material if corrosion is not properly managed. Currently corrosion inhibitor (CI) chemicals are used to ensure that the material degradation rates are properly controlled; this imposes operational constraints, costs of deployment and environmental issues. In specific conditions, a naturally growing corrosion product known as siderite or iron carbonate (FeCO3) precipitates onto the internal pipe wall providing protection from electrochemical degradation. Many parameters influence the thermodynamics of FeCO3 precipitation which is generally favoured at high values of temperatures, pressure and pH. In this paper, a new approach for corrosion management is presented; micro-modifying the corrosion product. This novel mitigation approach relies on enhancing the crystallisation of FeCO3 and improving its density, protectiveness and mechanical properties. The addition of a silicon-rich nanofiller is shown to augment the growth of FeCO3 at lower pH and temperature without affecting the bulk pH. The hybrid FeCO3 exhibits superior general and localised corrosion properties. The findings herein indicate that it is possible to locally alter the environment in the vicinity of the corroding steel in order to grow a dense and therefore protective FeCO3 film via the incorporation of hybrid organic-inorganic silsesquioxane moieties. The durability and mechanical integrity of the film is also significantly improved.

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“…However, M(4-VP) appears to have a higher affinity for Fe(II) than O(4-VP). Then, Fe(II)-4VP monomer complex is formed preferentially to FeCO 3 or Fe 2 (OH) 2 CO 3 corrosion layer [36][37][38]. The high mobility of the complex due to its small size associated to a strong agitation remove from the surface Fe(II) and subsequent corrosion product that could delete the corrosion kinetic and then let the surface totally active.…”

Section: Linear Polarization Resultsmentioning

confidence: 99%

Synthesis and Characterization of Oligomer 4-Vinylpyridine as A Corrosion Inhibitor for Mild Steel in CO<sub>2</sub> Saturated Brine Solution

Ilim

Jefferson²,

Simanjuntak

et al. 2018

Indones. J. Chem.

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In this work, the oligomer of 4-vinylpyridine designated as O(4-VP) was synthesized by hydrogen peroxide initiated chain growth polymerization and characterized in terms of molecular weight and structure by matrix assisted laser desorption ionization time of flight mass spectroscopy (MALDI-TOF MS). The oligomer was tested as corrosion inhibitor of mild steel in brine solution saturated with carbon dioxide, with the main purpose to investigate the effect of inhibitor concentrations and temperatures on the inhibition activity defined in terms of corrosion rate and percent of protection. The inhibition tests were carried out using the methods of weight loss (WL) and linear polarization (LP). Characterization using MALDI-TOF MS revealed that the oligomer has the mass (m/z) in the range 200-2400, which corresponds to chain length of 2-22 repeating units. The results of corrosion rate measurements show that the corrosion rate with the use of oligomer is significantly lower than that without inhibitor, demonstrating that the oligomer functioned as effective corrosion inhibitor, while the 4-vinyl pyridine monomer was found to promote the corrosion. It was also found that the protection by the oligomer increased with increasing temperature and it was predicted the oligomer was chemically adsorbed by the surface of the metal. Keywords: oligomer 4-vinylpyridine; corrosion inhibitor; CO 2 corrosion; MALDI-TOF MS ABSTRAK Dalam penelitian ini, oligomer 4-vinilpiridin, O(4-VP), disintesis menggunakan inisiator hidrogen peroksida untuk pertumbuhan rantai polimer dan dikarakterisasi berat molekul dan struktur molekulnya menggunakan matrix assisted laser desorpsion ionization time of flight mass spectroscopy (MALDI-TOF MS). Oligomer kemudian diuji sebagai inhibitor korosi baja ringan dalam larutan air garam yang jenuh dengan gas karbon dioksida, dengan tujuan utama untuk menyelidiki efek dari konsentrasi inhibitor dan suhu pada aktivitas inhibisi yang dinyatakan dalam bentuk laju korosi dan persen proteksi. Tes inhibisi dilakukan dengan menggunakan metode kehilangan berat (WL), dan polarisasi linier (LP). Karakterisasi menggunakan MALDI-TOF MS

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On the theory of CO2 corrosion reactions – Investigating their interrelation with the corrosion products and API-X100 steel microstructure

Cited by 73 publications

References 69 publications

Corrosion behavior of low-alloy steel with martensite/ferrite microstructure at vapor-saturated CO2 and CO2-saturated brine conditions

Corrosion behavior of low-alloy steel with martensite/ferrite microstructure at vapor-saturated CO2 and CO2-saturated brine conditions

Siderite micro-modification for enhanced corrosion protection

Synthesis and Characterization of Oligomer 4-Vinylpyridine as A Corrosion Inhibitor for Mild Steel in CO<sub>2</sub> Saturated Brine Solution

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