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but may also occur in concrete. Corrosion of concrete mediums leads to considerable losses in industrial settings. When considering the corrosion of concrete there is significant documentation of structural degradation in concrete wastewater infrastructure where wastewater is collected or treated.
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formed of diverse microbial communities. For instance, when isolating a sample of biofilm from a pipe within the first week of growth, the corrosion of the pipe accelerated, yet by the end of a month, the same biofilm began to act as a protective layer for the pipe. Variation between corrosion in
79:. In both general or pitting corrosion, the breakdown process occurs in aqueous conditions. Bacteria tend to form biofilms as their primary means of corroding metals, with different bacteria dominating across different settings. In municipal wastewater,
101:(Fe) goes into aqueous solution as positively charged cation, Fe. As the metal is oxidized under anaerobic conditions by the protons of water, H ions are reduced to form molecular H
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of metals typically alters the metal to a form that is more stable. Thus, bacterial anaerobic corrosion typically occurs in conditions favorable to the corrosion of the underlying
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An example of a biofilm blocking and insulating a given substrate from external pressures. Note that this biofilm is of variable community.
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similar environments might be attributed to the local bacterial communities. Biofilms further mediate corrosion by altering the
472:"Anaerobic microbiologically influenced corrosion mechanisms interpreted using bioenergetics and bioelectrochemistry: A review"
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Li, Yingchao; Xu, Dake; Chen, Changfeng; Li, Xiaogang; Jia, Ru; Zhang, Dawei; Sand, Wolfgang; Wang, Fuhui; Gu, Tingyue (2018).
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For bacterial anaerobic corrosion there is general corrosion of substrates as well as another form of corrosion known as
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425:"The mutual co-regulation of extracellular polymeric substances and iron ions in biocorrosion of cast iron pipes"
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Similarly, biofilms are important for bacterial anaerobic corrosion of metals in wastewater pipes.
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reaction. This redox reaction generates molecular hydrogen from local hydrogen ions. Conversely,
105:. This can be written in the following ways under acidic and neutral conditions respectively:
335:"Review of Microbially Induced Corrosion and Comments on Needs Related to Testing Procedures"
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Loto, C. A. (2017). "Microbiological corrosion: mechanism, control and impact—a review".
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Sabater, Sergi; Timoner, Xisca; Borrego, Carles; Acuña, Vicenç (2016).
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occurs spontaneously. Anaerobic corrosion primarily occurs on metallic
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Usually, a thin film of molecular hydrogen forms on the metal.
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International
Conference on Durability of Concrete Structures
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176:. Another reaction occurs between iron and water producing
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Bacterial anaerobic corrosion typically impacts metallic
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processes at the interface of the underlying substrate.
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There is varying impact on local corrosion noted from
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476:Journal of Materials Science & Technology
223:can, in this way, be far more harmful than
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231:Biofilms and Bacterial Anaerobic Corrosion
144:oxidize the molecular hydrogen to produce
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58:Diagram of bacterially-induced corrosion.
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85:is the main contributor to corrosion.
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333:House, Mitchell; Weiss, W. (2014).
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423:Jin, Juntao; Guan, Yuntao (2014).
378:Frontiers in Environmental Science
39:of metals occurs as a result of a
35:. In humid, anoxic conditions the
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51:but may also occur on concrete.
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441:10.1016/j.biortech.2014.06.059
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211:O → FeS + 3 Fe(OH)
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184:Fe + HS → FeS + H
117:Fe + 2 H → Fe + H
21:bacterially-induced oxidation
17:Bacterial anaerobic corrosion
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199:The net equation comes to:
82:Desulfovibrio desulfuricans
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488:10.1016/j.jmst.2018.02.023
219:This form of corrosion by
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309:10.1007/s00170-017-0494-8
221:sulfate-reducing bacteria
142:Sulfate-reducing bacteria
391:10.3389/fenvs.2016.00014
191:O → 3 Fe(OH)
429:Bioresource Technology
160: → HS + 3 H
129:O → Fe(OH)
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540:Biochemical reactions
348:10.5703/1288284315388
269:Denitrifying Bacteria
168:The iron ions partly
148:ions (HS) and water:
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303:(9–12): 4241–4252.
259:Microbial corrosion
225:anaerobic corrosion
45:anaerobic corrosion
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482:(10): 1713–1718.
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435:: 387–394.
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170:precipitate
529:Categories
514:2021-10-02
341:: 94–103.
275:References
264:Methanogen
187:3 Fe + 6 H
97:, such as
95:base metal
69:substrates
49:substrates
545:Corrosion
504:139700002
496:1005-0302
449:0960-8524
410:2296-665X
317:114187011
254:Corrosion
207:+ H + 3 H
203:4 Fe + SO
89:Chemistry
37:corrosion
33:substrate
29:Corrosion
535:Bacteria
508:Archived
457:25069092
248:See also
237:biofilms
172:to form
125:Fe + 2 H
77:pitting
63:Details
19:is the
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384:: 14.
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164:O + OH
25:metals
500:S2CID
313:S2CID
195:+ 6 H
41:redox
492:ISSN
453:PMID
445:ISSN
406:ISSN
353:ISBN
215:+ OH
156:+ SO
99:iron
484:doi
437:doi
433:169
396:hdl
386:doi
343:doi
305:doi
152:4 H
133:+ H
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