Evaluation of Microbiological Corrosion of API 5L X80 Steel by Electrochemical Techniques in Produced Water by the Oil Industry

Oliveira, Edkarlla Sousa Dantas de; Pereira, Roseana Florentino da Costa; Lima, Maria Alice Gomes de Andrade; Filho, Severino Leopoldino Urtiga

doi:10.1590/1980-5373-mr-2019-0525

Cited by 2 publications

(1 citation statement)

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“…It was found that the surface of X80 steel exposed to the biotic system showed pitting, probably due to the contact with aggressive substances from the metabolic activity of microorganisms present in the biofilm. Previous results revealed that the surface of the coupons from both systems showed localized or pitting corrosion morphology 31,67 . However, the coupons from the abiotic system exhibited almost imperceptible pits, while the coupons from the biotic system showed pits containing larger diameters.…”

Section: Surface Topographymentioning

confidence: 89%

Study on Biofilm Forming Microorganisms Associated with the Biocorrosion of X80 Pipeline Steel in Produced Water from Oilfield

et al. 2021

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Biocorrosion is the main process that causes pipeline damages and losses in the oil industry. The objective of this work was to investigate the influence of biofilm forming microorganisms on the biocorrosion of X80 steel exposed in produced water through microbiological characterization, film and biofilm analysis by optical microscopy and scanning electron microscopy, weight loss and surface analysis by laser confocal microscopy. Changes in produced water after 360 days were attributed to planktonic cells, temperature conditions, contact with air, photo-oxidation, biodegradation, and seasonality. The total aerobic bacteria presented sessile cell concentration of 7.39 x 10 4 CFU/cm 2 , while the other investigated groups showed lower concentrations. The micrography of the film showed salt crystals, whereas in the biofilm microorganisms, exopolysaccharides and corrosion products were observed. Weight loss after 360 days for the abiotic and biotic systems was 0.0222 g/cm 2 and 0.3039 g/cm 2 , respectively, showing that microorganisms accentuated the corrosion of X80 steel.

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Section: Surface Topographymentioning

confidence: 89%