Mikrobiell verursachte Korrosion an Stahlbauteilen

Binder, Günter; Graff, M.

doi:10.1002/maco.19950461106

Cited by 8 publications

(3 citation statements)

References 2 publications

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“…Die Besiedlung der Oberfla Èche der Stahlrammpfa Èhle weist einerseits Unterschiede zwischen der inneren und der a Èuûeren Oberfla Èche auf; andererseits unterscheiden sich gescha Èdigte, [6].…”

Section: Mikrobiologische Untersuchungenunclassified

Mikrobiell induzierte Korrosion (MIC) in marinem Milieu

Graff¹,

Klages²,

Binder

2000

Materials and Corrosion

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Section: Mikrobiologische Untersuchungenunclassified

Mikrobiell induzierte Korrosion (MIC) in marinem Milieu

Graff¹,

Klages²,

Binder

2000

Materials and Corrosion

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“…In aquatic environments, unalloyed steel such as sheet piles used for locks and weirs, can corrode due to Fe 0 oxidation, thereby reducing structural integrity which comes with safety risks (Binder & Graff, 1995; Heeling, 2017). In 2017, it was estimated that 3% to 4% of all nation's gross domestic product (GDP) constituted the prevention, maintenance or reconstruction related to damage caused by corrosion; globally, this corresponds to 2.5 trillion USD (Koch, 2017).…”

Section: Introductionmentioning

confidence: 99%

Microbially influenced corrosion and rust tubercle formation on sheet piles in freshwater systems

Fiskal

Shuster

Fischer

et al. 2023

Environmental Microbiology

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The extent of how complex natural microbial communities contribute to metal corrosion is still not fully resolved, especially not for freshwater environments. In order to elucidate the key processes, we investigated rust tubercles forming massively on sheet piles along the river Havel (Germany) applying a complementary set of techniques. In‐situ microsensor profiling revealed steep gradients of O2, redox potential and pH within the tubercle. Micro‐computed tomography and scanning electron microscopy showed a multi‐layered inner structure with chambers and channels and various organisms embedded in the mineral matrix. Using Mössbauer spectroscopy we identified typical corrosion products including electrically conductive iron (Fe) minerals. Determination of bacterial gene copy numbers and sequencing of 16S rRNA and 18S rRNA amplicons supported a densely populated tubercle matrix with a phylogenetically and metabolically diverse microbial community. Based on our results and previous models of physic(electro)chemical reactions, we propose here a comprehensive concept of tubercle formation highlighting the crucial reactions and microorganisms involved (such as phototrophs, fermenting bacteria, dissimilatory sulphate and Fe(III) reducers) in metal corrosion in freshwaters.

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“…There are other aquatic factors influencing corrosion: salinity, pH‐value, acid capacity, and water hardness . Moreover, in case of sheet pile steels in nature, there can be mechanical influences such as water movement and biochemical effects like microbial‐induced corrosion (MIC) .…”

Section: Introductionmentioning

confidence: 99%

Comparison of corrosion rates obtained from laboratory and field data

Ruppert

Frimmel

Baier

et al. 2016

Materials & Corrosion

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Generally, corrosion rates for sheet pile walls observed in nature and those obtained in the laboratory are different. In order to compare natural and laboratory corrosion rates, corrosion tests were carried out with an electrochemical corrosion cell. Various mild steel samples which were taken out from different sheet pile structures were examined with synthetic brackish water and synthetic seawater as immersion media. It was ensured that the electrical conductivity and the pH‐values were identical to those of the natural waters from which the sheet pile samples came from. The experimental results indicate that underwater corrosion rates in nature are only about one tenth to one eighth of the laboratory values. The corrosion rates in nature depend on the media and the corrosion zone. Furthermore, in laboratory test procedures, the initial corrosion is always tested whereas in nature a “protecting” layer of rust is formed, that lowers corrosion. Therefore, comparison of the values of the experiments with those from nature should be defined in accordance to age and zone of hydraulic steel structures. As a consequence, a corrosion coefficient with consideration of the age of structures was formed. The introduction of the coefficients's dependence on the lifetime of the construction allows improved corrosion rate predictions when the chemical composition of the immersion media is detected.

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Mikrobiell verursachte Korrosion an Stahlbauteilen

Cited by 8 publications

References 2 publications

Mikrobiell induzierte Korrosion (MIC) in marinem Milieu

Mikrobiell induzierte Korrosion (MIC) in marinem Milieu

Microbially influenced corrosion and rust tubercle formation on sheet piles in freshwater systems

Comparison of corrosion rates obtained from laboratory and field data

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