Corrosion of Iron Under Alternating Wet and Dry Conditions

Dunn, Darrell S.; Bogart, M. B.; Brossia, C. Sean; Cragnolino, Gustavo A.

doi:10.5006/1.3280551

Cited by 66 publications

(47 citation statements)

References 5 publications

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“…It should be noted that for severe atmospheres, such as marine-industrial and severe marine ones, the corrosion loss follows closely the power law. However, in less corrosive atmospheres, such as urban and rural ones, the metal may corrode in two steps [23].…”

Section: Results and Analysismentioning

confidence: 99%

“…This information is essential for the accurate prediction of the atmospheric corrosion degradation on steels. [7], [13], [14], [15], [16], [17], [18], [19], [20] γ-Fe 2 O 3 -Maghemite 345, 510, 645, 660-680, 710-720, 1198, 1412, 1425, 1440 [7], [13], [14], [15], [16], [17], [18], [19] α-Fe 2 O 3 -Haematite 225-227, 245,292-295, 412-415, 500-501, 612-615, 1312, 1320 [7], [13], [14], [15], [16], [17], [18], [19], [20] α-FeOOHGoethite 245-248, 293-303, 348, 386-397, 420, 480-485, 549-554, 675-686, 1002-1004, 1120, 1295 [7], [13], [14], [15], [16], [17], [18], [19], [20] γ-FeOOHLepidocrocite 248-255, 218, 374, 380, 528, 654-660, 695, 1054, 1300-1311 [7], [20], [21], [22] β-FeOOHAkaganeite 309-314, 330, 384, 380-388, 396, 400-415, 535-538, 722-745, 1389 [20], [21], [22], [23], [24] δ-FeOOH-Feroxyhyte 220, 295, 385, 400, 495, 655, 670-680, 1350 …”

Section: Raman Spectroscopymentioning

confidence: 99%

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Investigating atmospheric corrosion behavior of carbon steel in coastal regions of Mauritius using Raman Spectroscopy

et al. 2016

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Low carbon steel was exposed at two sites in Mauritius, namely Port Louis and Belle Mare. The site at Port Louis is basically an industrial marine one whereas the one at Belle Mare is a purely marine site. Though the corrosion loss trend at both sites follow the power law, the corrosion loss at Port Louis was found to be higher than that at Belle Mare. This study has been performed to investigate the surface characteristics of the rust layers of the samples exposed at the two sites, through Raman spectroscopy and SEM, so as to get a better insight into the mechanism of the atmospheric corrosion process. For Port Louis, it was observed that there was not much change in the corrosion products in the rust layer over the 3 years period. The structure was less compact than that at Belle Mare with the presence of lepidocrocite and akaganeite as commonly observed corrosion products. The corrosion rate at Port Louis is, therefore, expected to follow the same trend over the long term. For Belle Mare, the corrosion products changed significantly after 3 years of exposure. Though lepidocrocite and akaganeite were observed on the surface after 0.2 years of exposure, magnetite was the most probable corrosion product in the more compact rust layer after 3 years of exposure. This compactness of the rust layer is expected to have reduced the corrosion rate as compared to that of Port Louis. Significant changes in the corrosion rate at Belle Mare are, therefore, expected over the medium and the long term.

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Section: Results and Analysismentioning

confidence: 99%

Section: Raman Spectroscopymentioning

confidence: 99%

Investigating atmospheric corrosion behavior of carbon steel in coastal regions of Mauritius using Raman Spectroscopy

et al. 2016

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“…Algunos de ellos se han concentrado en caracterizar ambientes de corrosión [1] y otros en evaluar la resistencia a la corrosión atmosférica marina en aceros [2,3] y fundiciones [4][5][6]. La realización de trabajos como estos tiene una desventaja en común y es que para su realización se requiere de años, por ello algunos autores y en particular este equipo de trabajo, se han concentrado en buscar la forma de reducir estos tiempos a través de la realización de experiencias de corrosión acelerada [7][8][9][10][11][12][13][14][15][16], que tras poco tiempo (días) y en laboratorio puedan generar resultados concordantes con los obtenidos en años de exposición a la intemperie.…”

Section: Introductionunclassified

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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“…When exploiting low-pressure underground gas networks, almost no attention is paid to fighting against electric corrosion under the influence of alternating current, believing that this problem only affects longdistance main gas pipelines in the adjacent passage of power transmission lines [2]. In the countries of the former Soviet Union, the distribution gas pipelines of low pressure do not have active corrosion protection.…”

Section: Introductionmentioning

confidence: 99%

“…The analysis of publications on the issue of corrosion caused by alternating current [1][2][3] has shown that alternating current is an enhancing factor of influence during operation of pipelines in natural conditions. More significant corrosion damage to the material of the pipeline occurs as a result of the joint effect of both alternating current and ground electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Impact of AC Current Density on Material Corrosion of Distribution Pipelines

Poberezhny

Maruschak

Hrytsanchuk

et al. 2017

Koroze a Ochrana Materialu

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Vliv střídavého indukovaného proudu na korozní rychlost oceli St3 a 17GS byl pozorován v simulovaných půdních elektrolytech typických pro Ukrajinu. Ocel St3 je citlivější na přirozené korozní napadení v půdě i na napadení vyvolané střídavým proudem. Byla stanovena nejhorší prostředí z hlediska koroze v elektrolytech obsahujících chloridy či směs chloridů se sírany.

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Corrosion of Iron Under Alternating Wet and Dry Conditions

Cited by 66 publications

References 5 publications

Investigating atmospheric corrosion behavior of carbon steel in coastal regions of Mauritius using Raman Spectroscopy

Investigating atmospheric corrosion behavior of carbon steel in coastal regions of Mauritius using Raman Spectroscopy

Corrosión atmosférica acelerada en una fundición gris ASTM A48

Impact of AC Current Density on Material Corrosion of Distribution Pipelines

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