The electrochemistry of SRB corrosion and related inorganic phenomena.

Newman, R. C.; Webster, B.J.; Kelly, Robert G.

doi:10.2355/isijinternational.31.201

Cited by 46 publications

(25 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The role of FeS in SRBinduced corrosion was emphasized by several authors (77,78,80), but the exact mechanisms are apparently complex and insufficiently understood (51). Newman et al (1991) found the stimulatory effect of FeS to be small upon closer inspection and stated that the increased cathodic surface area provided by FeS was probably more important than its catalytic properties (81). Indeed, corrosion by FeS has so far been reported only for chemically prepared fine suspensions of the minerals (77)(78)(79)120).…”

Section: The Role Of Fes In Iron Corrosionmentioning

confidence: 99%

“…However, once the metallic surface is covered with inorganic corrosion products such as FeS, cathodic reactions become more important drivers of metal oxidation (81). It has been suggested that such cathodic stimulation results from biogenic dissolved sulfides (29,83,104,111).…”

Section: Emic Versus Cmic-emerging Theories In Srb-induced Corrosionmentioning

confidence: 99%

“…Furthermore, considerable attention was given to the formation of protective ("passivating") iron sulfide films (51,76,81,82), i.e., a common phenomenon which reduces rather than accelerates the corrosion of iron by impeding the diffusion of oxidized iron (ions) from the metal surface to the bulk liquid. It is generally agreed that such thin iron sulfide layers are among the rate-controlling factors of corrosion (9,51,83).…”

Section: Srb: Long-known Key Players In Anaerobic Iron Corrosionmentioning

confidence: 99%

See 2 more Smart Citations

Corrosion of Iron by Sulfate-Reducing Bacteria: New Views of an Old Problem

Enning

Garrelfs

2014

Appl Environ Microbiol

658

414

View full text Add to dashboard Cite

About a century ago, researchers first recognized a connection between the activity of environmental microorganisms and cases of anaerobic iron corrosion. Since then, such microbially influenced corrosion (MIC) has gained prominence and its technical and economic implications are now widely recognized. Under anoxic conditions (e.g., in oil and gas pipelines), sulfate-reducing bacteria (SRB) are commonly considered the main culprits of MIC. This perception largely stems from three recurrent observations. First, anoxic sulfate-rich environments (e.g., anoxic seawater) are particularly corrosive. Second, SRB and their characteristic corrosion product iron sulfide are ubiquitously associated with anaerobic corrosion damage, and third, no other physiological group produces comparably severe corrosion damage in laboratory-grown pure cultures. However, there remain many open questions as to the underlying mechanisms and their relative contributions to corrosion. On the one hand, SRB damage iron constructions indirectly through a corrosive chemical agent, hydrogen sulfide, formed by the organisms as a dissimilatory product from sulfate reduction with organic compounds or hydrogen ("chemical microbially influenced corrosion"; CMIC). On the other hand, certain SRB can also attack iron via withdrawal of electrons ("electrical microbially influenced corrosion"; EMIC), viz., directly by metabolic coupling. Corrosion of iron by SRB is typically associated with the formation of iron sulfides (FeS) which, paradoxically, may reduce corrosion in some cases while they increase it in others. This brief review traces the historical twists in the perception of SRB-induced corrosion, considering the presently most plausible explanations as well as possible early misconceptions in the understanding of severe corrosion in anoxic, sulfate-rich environments. E ver since its first production roughly 4,000 years ago, iron has played a central role in human society due to its excellent mechanical properties and the abundance of its ores. Today, iron is used in much larger quantities than any other metallic material (1) and is indispensable in infrastructure, transportation, and manufacturing. A major drawback is the susceptibility of iron to corrosion. Corrosion of iron and other metals causes enormous economic damage. Across all industrial sectors, the inferred costs of metal corrosion have been estimated to range between 2% and 3% of gross domestic product (GDP) in developed countries (2, 3). These costs are to a large extent caused by corrosion of iron, due to its abundant use and particular susceptibility to oxidative damage. Estimates of the costs attributable to biocorrosion of iron lack a computed basis so that they vary widely, and definite numbers cannot be given with certainty. Still, microbially influenced corrosion (MIC) probably accounts for a significant fraction of the total costs (4-7), and, due to its effects on important infrastructure in the energy industry (such as oil and gas pipelines), costs in the range of billions of...

show abstract

Section: The Role Of Fes In Iron Corrosionmentioning

confidence: 99%

Section: Emic Versus Cmic-emerging Theories In Srb-induced Corrosionmentioning

confidence: 99%

Section: Srb: Long-known Key Players In Anaerobic Iron Corrosionmentioning

confidence: 99%

See 1 more Smart Citation

Corrosion of Iron by Sulfate-Reducing Bacteria: New Views of an Old Problem

Enning

Garrelfs

2014

Appl Environ Microbiol

658

414

View full text Add to dashboard Cite

show abstract

“…Redox potential (Eh) of all water samples lie within a range from -372mV to +202mV as illustrated graphically in Fig.6. Spectrum of redox potential under which microbial life can be found ranges from -450mV to +850mV, where the negative side of the spectrum favours methanogenic bacteria, and the positive side corresponds to iron bacteria (Newman et al, 1991). Thus, the positive redox potential values obtained for samples collected from Forcados River by Beniboye Flow Station and New Calabar River by Wilbross (Nig) Ltd indicate the presence of iron oxidizing bacteria.…”

Section: Water Analysismentioning

confidence: 99%

Some physico-chemical and biological characteristics of soil and water samples of part of the Niger Delta area, Nigeria

Puyate¹,

Rim-Rukeh²

2010

Journal of Applied Sciences and Environmental Management

View full text Add to dashboard Cite

“…The presence of higher phosphate concentration in EDS spectra indicates the role of phosphorus compounds in addition to sulfides on corrosion reactions. FeS decreases hydrogen over potential and cause cathodic depolarization [46,47]. This sulfide, in turn, reacts with iron (main constituent of steel) to form iron sulfide.…”

mentioning

confidence: 99%

Microbial influenced corrosion by thermophilic bacteria

2011

View full text Add to dashboard Cite

The present study was undertaken to investigate microbial influenced corrosion (MIC) on stainless steels due to thermophilic bacteria Desulfotomaculum nigrificans. The objective of the study was to measure the extent of corrosion and correlate it with the growth of the biofilm by monitoring the composition of its extracellular polymeric substances (EPS). The toxic effect of heavy metals on MIC was also observed. For this purpose, stainless steels 304L, 316L and 2205 were subjected to electrochemical polarization and immersion tests in the modified Baar's media, control and inoculated, in anaerobic conditions at room temperature. Scanning electron microscopy (SEM)/ energy dispersive spectroscopy (EDS) were used to identify the chemicals present in/outside the pit. The results show maximum corrosive conditions when bacterial activity is highest, which in turn minimizes the amount of carbohydrate and protein along with the increase in the fraction of uronic acid in carbohydrate in EPS of the biofilm. However, although bacterial activity and corrosion rate decreases, the amount of biofilm components continue to increase. It is also observed that the toxicity of metals ions affect the bacterial activity and EPS production. It was observed that Desulfotomaculum sp. has the ability to biodegrade its own EPS.

show abstract

The electrochemistry of SRB corrosion and related inorganic phenomena.

Abstract: Sulfate-reducing bacteria can cause or influence corrosion in both carbon (or low-alloy)

Cited by 46 publications

References 0 publications

Corrosion of Iron by Sulfate-Reducing Bacteria: New Views of an Old Problem

Corrosion of Iron by Sulfate-Reducing Bacteria: New Views of an Old Problem

Some physico-chemical and biological characteristics of soil and water samples of part of the Niger Delta area, Nigeria

Microbial influenced corrosion by thermophilic bacteria

Contact Info

Product

Resources

About