Comparison of flow regimes on biocorrosion of steel pipe weldments: Fluid characterization and pitting analysis

Liduino, Vitor Silva; Filho, João C. Payão; Cravo‐Laureau, Cristiana; Lutterbach, Márcia Teresa Soares; Sérvulo, Eliana Flávia Camporese

doi:10.1016/j.ibiod.2019.104750

Cited by 9 publications

(1 citation statement)

References 59 publications

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“…Previous studies were performed to obtain practical information, as close as possible, on weld biocorrosion in storage tanks (static seawater condition) [19] and oil pipelines experiencing both laminar and turbulent ows [20][21]. These studies reinforced that HAZ was the most pitting affected area among the three weld parts (BM, HAZ and WM) in any operational condition.…”

Section: Introductionmentioning

confidence: 85%

Corrosion of Weld Heat-Affected Zones Submersed in Seawater with Indigenous Microorganisms

et al. 2023

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The corrosion behaviors of different weld heat-affected zones (HAZs) were investigated, comprising an API 5L X65 steel immersed in seawater with an abundant native microbial community. Before tests, HAZ physical simulations were performed at the peak temperatures of 700°C, 860°C, 1000°C, and 1350°C. Throughout 14 days of immersion, various planktonic bacterial groups associated with microbiologically in uenced corrosion were metabolically active in the seawater. Desulfovibrio members were present in a considerable number of OTUs. Scanning electron microscopy showed an intense microbial adhesion and corrosion product deposits in all HAZ sub-regions and the control base metal coupon (BM). The electrochemical tests revealed that the corrosion behavior of all HAZ sub-regions and BM were indistinguishable. However, topography analysis showed different behaviors of pitting corrosion. The results revealed that the pitting resistance of the microstructure composed of cementite grains (700°C HAZ) was superior to that of other HAZ sub-regions. On the other hand, the microstructure composed of martensite and austenite grains (860°C HAZ) exhibited the worst pitting resistance of the weld joint, leading to a maximum pit penetration of 2.3 times greater than that pit on the BM. The changes in the HAZ sub-region sensitivity to pitting corrosion were attributed to variations in the microstructural composition.

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Section: Introductionmentioning

confidence: 85%

Corrosion of Weld Heat-Affected Zones Submersed in Seawater with Indigenous Microorganisms

et al. 2023

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Antibiofilm effect of mono‐rhamnolipids and di‐rhamnolipids on carbon steel submitted to oil produced water

Rocha

Castilho

Castro

et al. 2021

Biotechnology Progress

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The objective of this study was to compare the potential of mono-rhamnolipids (mono-RML) and di-rhamnolipids (di-RML) against biofilm formation on carbon steel coupons submitted to oil produced water for 14 days. The antibiofilm effect of the RML on the coupons was analyzed by scanning electron microscopy (SEM) and by epifluorescence microscopy, and the contact angle was measured using a goniometer. SEM analysis results showed that all RML congeners had effective antibiofilm action, as well as preliminary anticorrosion evaluation confirmed that all RML congeners prevented the metal deterioration. In more detail, epifluorescence microscopy showed that mono-RML were the most efficient congeners in preventing microorganism's adherence on the carbon steel metal. Image analyses indicate the presence of 15.9%, 3.4%, and <0.1% of viable particles in di-RML, mono/di-RML and mono-RML pretreatments, respectively, in comparison to control samples. Contact angle results showed that the crude carbon steel coupon presented hydrophobic character favoring hydrophobic molecules adhesion. We calculated the theoretical polarity of the RML congeners and verified that mono-RML (log P = 3.63) presented the most hydrophobic character. This had perfect correspondence to contact angle results, since mono-RML conditioning (58.2 ) more significantly changed the contact angle compared with the conditioning with one of the most common surfactants used on oil industry (29.4 ). Based on the results, it was concluded that rhamnolipids are efficient molecules to be used to avoid biofilm on carbon steel metal when submitted to oil produced water and that a higher proportion of mono-rhamnolipids is more indicated for this application.

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Evaluation of Syzygium aromaticum aqueous extract as an eco-friendly inhibitor for microbiologically influenced corrosion of carbon steel in oil reservoir environment

Parthipan

AlSalhi

Devanesan

et al. 2021

Bioprocess Biosyst Eng

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Comparison of flow regimes on biocorrosion of steel pipe weldments: Fluid characterization and pitting analysis

Cited by 9 publications

References 59 publications

Corrosion of Weld Heat-Affected Zones Submersed in Seawater with Indigenous Microorganisms

Corrosion of Weld Heat-Affected Zones Submersed in Seawater with Indigenous Microorganisms

Antibiofilm effect of mono‐rhamnolipids and di‐rhamnolipids on carbon steel submitted to oil produced water

Evaluation of Syzygium aromaticum aqueous extract as an eco-friendly inhibitor for microbiologically influenced corrosion of carbon steel in oil reservoir environment

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