The critical involvement of anaerobic bacterial activity in modelling the corrosion behaviour of mild steel in marine environments

Melchers, Robert E.; Jeffrey, R.

doi:10.1016/j.electacta.2008.02.107

Cited by 80 publications

(76 citation statements)

References 32 publications

(39 reference statements)

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“…Researchers [8,16,47,67,75,110,140,[143][144][145] proposed a widely accepted multiphase phenomenological model for corrosion loss as a function of exposure period. As shown in Figure 12, the model was developed based on corrosion science philosophy.…”

Section: Figure 12adapted From [110]mentioning

confidence: 99%

Modelling of pitting corrosion in marine and offshore steel structures – A technical review

Bhandari

Khan

Abbassi

et al. 2015

Journal of Loss Prevention in the Process Industries

359

104

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Section: Figure 12adapted From [110]mentioning

confidence: 99%

Modelling of pitting corrosion in marine and offshore steel structures – A technical review

Bhandari

Khan

Abbassi

et al. 2015

Journal of Loss Prevention in the Process Industries

359

104

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“…In each of these two modes, the model has a number of different phases, each of which idealize the dominant corrosion process at that time. The details have been given many times (e.g., [7]) and need not be rehearsed here.…”

Section: Introductionmentioning

confidence: 99%

A Review of Trends for Corrosion Loss and Pit Depth in Longer-Term Exposures

Melchers

2018

CMD

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For infrastructure applications in marine environments, the eventual initiation of corrosion (and pitting) of steels (and other metals and alloys) often is assumed an inescapable fact, and practical interest then centres on the rate at which corrosion damage is likely to occur in the future. This demands models with a reasonable degree of accuracy, preferably anchored in corrosion theory and calibrated to actual observations under realistic exposure conditions. Recent developments in the understanding of the development of corrosion loss and of maximum pit depth in particular are reviewed in light of modern techniques that permit much closer examination of pitted and corroded surfaces. From these observations, and from sometimes forgotten or ignored observations in the literature, it is proposed that pitting (and crevice corrosion) plays an important role in the overall corrosion process, but that longer term pitting behaviour is considerably more complex than usually considered. In turn, this explains much of the, often high, variability in maximum depths of pits observed at any point in time. The practical implications are outlined.

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“…Existe diferencia de los espesores corroídos en el tiempo, la cual se atribuye a la diferencia de composiciones químicas que presentan ambas fundiciones de estudio, tal como antes se ha discutido para aceros [2,3,18]. Sería esperable que el comportamiento fuera similar si las composiciones químicas fueran las mismas [9].…”

Section: Análisis De Resultados Posterior a Ensayo De Corrosión Aceleunclassified

“…La forma de esta expresión surge del supuesto que la corrosión comienza inmediatamente y se produce de manera indefinida [18,19]. No obstante, existen ciertos productos de corrosión que protegen los materiales frente a este fenómeno y por tanto la concentración de oxígeno sobre el sustrato es distinta en el tiempo.…”

Section: Modelos De Corrosiónunclassified

Corrosión atmosférica acelerada en una fundición gris ASTM A48

et al. 2018

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RESUMENDebido a los extensos tiempos que conllevan los estudios relativos a resistencia a la corrosión atmosférica, estos datos son escasos. Uno de estos, es el realizado por Southwell et al., en el que se estudió el efecto de la corrosión durante 16 años para una fundición gris en una diversidad de ambientes.El presente trabajo expone y discute los resultados obtenidos tras someter a una fundición gris a un ensayo de corrosión acelerada, que involucra ciclos de humectación en cámara de niebla, lavado y secado, durante 40 días. Además, se ha realizado una experiencia en la que se sumergieron muestras de fundición gris en agua de mar natural y agua de mar esterilizada con UV, encontrando una relación directa entre la presencia de bacterias y un aumento en la rugosidad superficial de las muestras expuestas a estas soluciones durante 14 días.Los resultados obtenidos revelaron que la fundición gris presenta un comportamiento bimodal, que es concordante con lo descrito por Melchers para aceros de baja aleación y con la investigación desarrollada por Southwell et al. Este comportamiento bimodal, según Melchers et al. genera un punto de inflexión en el avance de la corrosión, influenciado por bacterias en la interfase metal-productos de corrosión. Esto último, se valida evidenciando actividad bacteriana tras identificar presencia de Azufre, mediante EDS, en los productos de corrosión desarrollados tras la exposición al ensayo de corrosión acelerada. Finalmente se puede comentar que en pocas semanas y empleando un ensayo de corrosión acelerada es posible replicar las condiciones bajo las que se realiza corrosión atmosférica marina durante años, para una fundición gris, incluso evidenciando actividad bacteriana.Palabras clave: corrosión atmosférica, fundición gris, pérdida en peso, corrosión bacteriana. ABSTRACTDue to the long times required to investigate atmospheric corrosion resistance of metals, data on the subject is scarce. One of these studies is the one made by Southwell et al., where the effect of corrosion in a cast gray iron during 16 years was studied in various environments.This research shows and discusses the behavior of cast gray iron when subject to an accelerated corrosion test, which involves wetting in a salt spray chamber, washing and drying cycles during 40 days. Furthermore, samples were submerged in sea water, both natural and UV-sterilized. A direct relationship amongst the presence of bacteria and an increase of surface roughness was found when subject to these conditions during 14 days.Results show that the cast gray iron shows a bimodal behavior, like the observations reported by Melchers on low-alloy steels and the research by Southwell.et al. As described by Melchers, this behavior generates an inflection point in the evolution of corrosion influenced by the presence of bacteria on the metal/corrosionproducts interphase. This is validated observing evidence of bacterial activity identifying the presence of sulphur on the corrosion products by EDS after the accelerated corrosion tests.

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The critical involvement of anaerobic bacterial activity in modelling the corrosion behaviour of mild steel in marine environments

Cited by 80 publications

References 32 publications

Modelling of pitting corrosion in marine and offshore steel structures – A technical review

Modelling of pitting corrosion in marine and offshore steel structures – A technical review

A Review of Trends for Corrosion Loss and Pit Depth in Longer-Term Exposures

Corrosión atmosférica acelerada en una fundición gris ASTM A48

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