Microbial Methane Production Associated with Carbon Steel Corrosion in a Nigerian Oil Field

Using the methods of gravimetry, potentiodynamic polarization, and impedance spectroscopy, the protective effectiveness of the inhibitory composition INCORGAZ-111 with respect to hydrogen sulfide corrosion of carbon steel St3 in NACE and Samotlor oil field model stratum waters has been studied. Surface coverage is determined on the basis of the electric double layer capacity in presence of the inhibitor. Its adsorption is interpreted using the polylogarithmic isotherm with a big energy gradient of adsorption centers, that indicates linear energy heterogeneity of the surface. The constants of adsorption equilibrium, the energy gradient and the energy dispersion of adsorption centers as well as adsorption free energy were calculated.

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Corrosion Behavior of Carbon Steel in Synthetically Produced Oil Field Seawater

International Journal of Metals ◽

10.1155/2014/628505 ◽

2014 ◽

Vol 2014 ◽

pp. 1-11 ◽

Cited By ~ 3

Author(s):

Subir Paul ◽

Anjan Pattanayak ◽

Sujit K. Guchhait

Keyword(s):

Carbon Steel ◽

Grain Boundary ◽

Mild Steel ◽

Corrosion Behavior ◽

Steel Corrosion ◽

Steel Structure ◽

Oil Production ◽

Oil Field ◽

Corrosion Products ◽

Material Degradation

The life of offshore steel structure in the oil production units is decided by the huge corrosive degradation due to SO42-, S2−, and Cl−, which normally present in the oil field seawater. Variation in pH and temperature further adds to the rate of degradation on steel. Corrosion behavior of mild steel is investigated through polarization, EIS, XRD, and optical and SEM microscopy. The effect of all 3 species is huge material degradation with FeSx and FeCl3 and their complex as corrosion products. EIS data match the model of Randle circuit with Warburg resistance. Addition of more corrosion species decreases impedance and increases capacitance values of the Randle circuit at the interface. The attack is found to be at the grain boundary as well as grain body with very prominent sulphide corrosion crack.

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On the possibility of influence of micromycetes on corrosion behaviour of carbon steel

Вестник Пермского университета Серия «Химия» = Bulletin of Perm University CHEMISTRY ◽

10.17072/2223-1838-2020-1-84-93 ◽

2020 ◽

Vol 10 (1) ◽

pp. 84-93

Author(s):

Natalia A. Medvedeva ◽

Svetlana Y. Balandina ◽

Alice G. Bortnik ◽

Mariia D. Plotnikova ◽

Natalya Y. Lisovenko

Keyword(s):

Carbon Steel ◽

Corrosion Behaviour ◽

Steel Corrosion ◽

Corrosion Damage ◽

Oil Field ◽

Quality Grade ◽

Water And Soil Samples ◽

Ulcerative Lesions ◽

Structural Carbon ◽

Structural Carbon Steel

It is determined that in the oil field regions of the Perm Territory, water and soil samples contain micromycetes of various kinds. Penicillium, Aspergillus, Trichoderma were identified and identified. The effect of micromycetes on steel corrosion was investigated using the fungus resistance method. It was established that the presence of Penicillium, Aspergillus, Trichoderma causes significant corrosion damage to structural carbon steel quality grade St20. The nature of corrosion damage was determined by optical microscopy. It was shown that the areas affected by micromycetes have an uneven nature of corrosion damage with individual point and ulcerative lesions of the St20 surface. The change in the intensity of the growth of micromycetes of various kinds on steel from the time of exposure was established.

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