Analysis of Long-Term Atmospheric Corrosion Results from ISO CORRAG Program

Dean, S. W.; Reiser, DB

doi:10.1520/stp10879s

Cited by 25 publications

(26 citation statements)

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“…Dean [69] reviewed the results obtained for steel in 8-year data from the ISOCORRAG collaborative programme [70]. The time of wetness (TOW) affected positively the value of b for steel, i.e.…”

Section: Prediction Of Corrosion Ratesmentioning

confidence: 99%

Long-term atmospheric corrosion of mild steel

Fuente¹,

Díaz²,

Simancas³

et al. 2011

Corrosion Science

444

170

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A great deal of information is available on the atmospheric corrosion of mild steel in the short, mid and even long term, but studies of the structure and morphology of corrosion layers are less abundant and generally deal with those formed in just a few years. The present study assesses the structure and morphology of corrosion product layers formed on mild steel after 13 years of exposure in five Spanish atmospheres of different types:rural, urban, industrial, and marine (mild and severe). The corrosion layers have been characterised by X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS). Long-term corrosion is seen to be more severe in the industrial and marine atmospheres, and less so in the rural and urban atmospheres. In all cases the corrosion rate is seen to decrease with exposure time, stabilising after the first 4-6 years of exposure. The most relevant aspects to be noted are: (a) the great compaction of the rust layers formed in the rural and urban atmospheres; (b) the formation of hematite and ferrihydrite phases (not commonly found) in the industrial and marine atmospheres, respectively; and (c) identification of the typical morphological structures of lepidocrocite (sandy crystals and flowery plates), goethite (cotton balls structures), and akaganeite (cotton balls structures and cigarshaped crystals).Key words: A. Mild steel; B. XRD; B. SEM; C. Long-term atmospheric corrosion; C. Morphology. INTRODUCTIONSteel is the most commonly employed metallic material in open-air structures and is used to make a wide range of equipment and metallic structures due to its low cost and The atmospheric corrosion of mild steel is an extensive topic that has been studied by many authors. Useful reviews have been performed by several researchers [1][2][3][4][5].A large amount of information is available on the atmospheric corrosion of mild steel in the short and mid term. Information on long-term exposure (10-20 years) is considerably less abundant, and no consistent data is available for exposure times over 50 years [6].A great deal of effort has been dedicated to identifying corrosion products and quantifying the effect of corrosion in terms of mass loss, and a number of models have been developed to describe the influence of various environmental parameters on the corrosion rate; particularly the sulphur dioxide and chloride concentration [7]. An aspect that has been relatively little studied is the morphology of the corrosion products that grow on the steel surface in the form of thin or thick films.The present study concentrates on the morphology of corrosion product films formed on mild steel after long-term atmospheric exposure (13 years) in five Spanish atmospheres of different types: rural, urban, industrial, mild marine and severe marine.Characterisation was performed by scanning electron microscopy/energy dispersive Xray spectroscopy (SEM/EDS), X-ray diffraction (XRD), and extractable ion (SO 4 2-, Clanalysis. EXPERIMENTALMild steel test panels, ...

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Section: Prediction Of Corrosion Ratesmentioning

confidence: 99%

Long-term atmospheric corrosion of mild steel

Fuente¹,

Díaz²,

Simancas³

et al. 2011

Corrosion Science

444

170

View full text Add to dashboard Cite

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“…In a previous paper, Morcillo et al [98] studied the goodness of the power model (Eq. (21)) on the basis of all the information compiled for mild steel in a comprehensive literature survey of corrosion data obtained in exposures of 10 years or more.…”

Section: Prediction Of Corrosion Ratesmentioning

confidence: 99%

Atmospheric corrosion of mild steel

Morcillo¹,

Fuente²,

Díaz³

et al. 2011

REVMETAL

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The atmospheric corrosion of mild steel is an extensive topic that has been studied by many authors in different regions throughout the world. This compilation paper incorporates relevant publications on the subject, in particular about the nature of atmospheric corrosion products, mechanisms of atmospheric corrosion and kinetics of the atmospheric corrosion process, paying special attention to two matters upon which relatively less information has been published: a) the morphology of steel corrosion products and corrosion product layers; and b) long-term atmospheric corrosion (>10 years). KeywordsAtmospheric corrosion; Mild steel; Long-term; Morphology; Review. corrosión atmosférica del acero suave resumenLa corrosión atmosférica del acero suave es un tema de gran amplitud que ha sido tratado por muchos autores en numerosas regiones del mundo. Este artículo de compilación incorpora publicaciones relevantes sobre esta temática, en particular sobre la naturaleza de los productos de corrosión atmosférica, mecanismos y cinética de los procesos de corrosión atmosférica, prestando una atención especial a dos aspectos sobre los que la información publicada ha sido menos abundante: a) morfología de los productos de corrosión del acero y capas de productos de corrosión, y b) corrosión atmosférica a larga duración (> 10 años).

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“…Among others, the International Organisation for Standardisation (ISO) examined eight years of atmospheric corrosion data on different types of metals in up to 51 different sites to develop a regression model for calculating the corrosion rate (Dean and Reiser, 2002). The regression model considered the temperature, the relative humidity, the atmospheric salinity and the pollution concentration.…”

Section: Corrosion Models: Classification Schemes Statistical Modelsmentioning

confidence: 99%

Predicting remaining life of transmission tower steelwork components

Segovia¹,

Catterson²,

Stuart

et al. 2016

Risk, Reliability and Safety: Innovating Theory and Practice

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Failures in transmission tower's components usually result in extended disruption of power supply. Repair is very costly as it involves replacement of the transmission lines' sections affected. Additionally, it might also entail litigation cost associated with power disruption. Maintenance decisions have to be taken in time to prevent a failure. At present, maintenance decisions are mainly based on expert's judgement, who perform inspections every 10 to 12 years. On specific sites, tower's components degrade much faster due to aggressive atmospheric conditions, with corrosion being the primary cause of deterioration. In this context, data indicating health state from an UK utility were used to create a Cox model that relates the time before a failure occurs to climatic and atmospheric conditions highly correlated with corrosion. The paper demonstrates the use of the model for predicting remaining tower life, and highlights how this can feed into maintenance planning.

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Analysis of Long-Term Atmospheric Corrosion Results from ISO CORRAG Program

Cited by 25 publications

References 0 publications

Long-term atmospheric corrosion of mild steel

Long-term atmospheric corrosion of mild steel

Atmospheric corrosion of mild steel

Predicting remaining life of transmission tower steelwork components

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