Biocorrosion: towards understanding interactions between biofilms and metals

Beech, Iwona B.; Sunner, Jan

doi:10.1016/j.copbio.2004.05.001

Cited by 795 publications

(341 citation statements)

References 31 publications

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“…11 Research by Lytle et al also found that the sulde produced by SRB could affect the iron geochemistry of the corrosion scales in DWDSs. 4 However, many previous studies focused on the microbially inuenced corrosion (MIC) processes of metallic materials, [12][13][14] little attention was paid to the effect of biolm communities on the composition of corrosion products and the key factors inuencing corrosion product release behavior.…”

Section: Introductionmentioning

confidence: 99%

Formation and release behavior of iron corrosion products under the influence of bacterial communities in a simulated water distribution system

Sun

Shi

Lytle

et al. 2014

Environ. Sci.: Processes Impacts

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To understand the formation and release behavior of iron corrosion products in a drinking water distribution system, annular reactors (ARs) were used to investigate the development processes of corrosion products and biofilm community as well as the concomitant iron release behavior. Results showed that the formation and transformation of corrosion products and bacterial community are closely related to each other. The presence of sulfate-reducing bacteria (SRB, e.g. Desulfovibrio and Desulfotomaculum), sulfur-oxidizing bacteria (SOB, e.g. Sulfuricella), and iron-oxidizing bacteria (IOB, e.g. Acidovorax, Gallionella, Leptothrix, and Sphaerotilus) in biofilms could speed up iron corrosion; however, iron-reducing bacteria (IRB, e.g. Bacillus, Clostridium, and Pseudomonas) could inhibit iron corrosion and iron release. Corrosion scales on iron coupons could develop into a two-layered structure (top layer and inner layer) with time. The relatively stable constituents such as goethite (a-FeOOH) and magnetite (Fe 3 O 4 ) mainly existed in the top layers, while green rust (Fe 6 (OH) 12 CO 3 ) mainly existed in the inner layers. The IOB (especially Acidovorax) contributed to the formation of a-FeOOH, while IRB and the anaerobic conditions could facilitate the formation of Fe 3 O 4 . Compared with the AR test without biofilms, the iron corrosion rate with biofilms was relatively higher (p < 0.05) during the whole experimental period, but the iron release with biofilms was obviously lower both at the initial stage and after 3 months. Biofilm and corrosion scale samples formed under different water supply conditions in an actual drinking water distribution system verified the relationships between the bacterial community and corrosion products. Environmental impactIron pipe corrosion and the release of corrosion products could greatly affect the integrity of water distribution infrastructure and the safety of drinking water at consumer ends. Corrosion scales formed by the accumulation of corrosion products under different water supply conditions had different morphological and compositional characteristics, which are closely associated with the processes of iron corrosion and release. Biolms developed on the internal surface of distribution pipes could play crucial roles in corrosion reactions and the composition of corrosion scales. Therefore, understanding the effects of bacterial community structure on the iron corrosion, iron release and associated corrosion by-products could provide scientic support for drinking water quality and distribution infrastructure maintenance.

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Section: Introductionmentioning

confidence: 99%

Formation and release behavior of iron corrosion products under the influence of bacterial communities in a simulated water distribution system

Sun

Shi

Lytle

et al. 2014

Environ. Sci.: Processes Impacts

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“…Some microbes may even have the oxide film or the substrate as an essential component of their metabolism (cf. ASME [1]; Beech and Sunner [2]). …”

Section: Introductionmentioning

confidence: 99%

Phase field modelling of stress corrosion

Ståhle

Hansen

2015

Engineering Failure Analysis

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“…donde, [H 2 S] es la concentración de sulfuro medida por el microelectrodo, K 1 es la primera constante de disociación del sistema de equilibrio del sulfuro y [H 3 O + ] la concentración de protones obtenida a partir de los valores de pH medidos en perfiles paralelos al mismo tiempo que los valores de [H 2 S]. Para valores de pH < 9, esta ecuación se simplifica a:…”

Section: Microgradientes Físico-químicos En El Interior De La Biopelíunclassified

“…En ambientes oxigenados, la presencia de heterogeneidades en el recubrimiento de la biopelícula sobre la superficie metálica da lugar a la formación de celdas de aireación diferencial, que favorecen un ataque localizado de la superficie del metal [9] . Estas celdas también aparecen cuando la actividad microbiana de la biopelícu-la crea nichos anóxicos en un ambiente oxigenado [3] . La actividad de las BSR se ha relacionado, desde hace años, con un incremento de las tasas de corrosión de diversos metales, por su papel en la generación de sulfuro [4, 8, 10 y 11] .…”

Section: Introductionunclassified

Efecto de la biopelícula en la corrosión de aceros inoxidables

et al. 2010

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ResumenEn este trabajo se ha estudiado la influencia de las biopelículas en los procesos de corrosión de diferentes aleaciones de acero inoxidable, situadas durante 4 años en dos puntos de una estación depuradora de aguas residuales. Se caracterizó el microambiente físico-químico en el interior de las biopelículas mediante microelectrodos de O 2 , H 2 S y pH, y se cuantificaron las tasas de corrosión a partir del número, diámetro y profundidad de picadura. Los resultados obtenidos muestran un desarrollo más notable de las biopelículas y un número de picaduras significativamente mayor en el canal de salida de desbastes que en el canal de recirculación de fangos. Con base en las características del agua sobrenadante y en las medidas realizadas con microelectrodos, se sugiere que la biopelícula induce la corrosión a través de tres posibles mecanismos: creación de celdas de aireación diferencial, zonas con diferente pH y zonas con elevada producción de sulfuro capaz de reaccionar con iones metálicos. Palabras claveBiopelículas; Biocorrosión; Acero inoxidable; Microelectrodos; Sulfuro. Effect of biofilm in the corrosion of austenitic stainless steels in wastewater treatment plants AbstractIn this work, the influence of the biofilms in the corrosion process of different alloys of stainless steel was studied in two sampling points in a wastewater treatment plant during 4 years. The physicochemical microenvironment within the biofilms was characterized through O 2 , H 2 S and pH microelectrodes. Corrosion rates were quantified from the number, diameter and depth of pits. The results show a remarkable development of the biofilm and a significantly greater number of pits in the grit removal channel than in the sludge recirculation channel. Based on the characteristics of the water phase and microelectrode measurements, our results suggest that biofilms induced corrosion throughout 3 mechanisms: creation of differential aeration cells, areas with different pH and areas having high sulphide production which may react with metal ions.

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Biocorrosion: towards understanding interactions between biofilms and metals

Cited by 795 publications

References 31 publications

Formation and release behavior of iron corrosion products under the influence of bacterial communities in a simulated water distribution system

Formation and release behavior of iron corrosion products under the influence of bacterial communities in a simulated water distribution system

Phase field modelling of stress corrosion

Efecto de la biopelícula en la corrosión de aceros inoxidables

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