Technical Note:A Mechanism ofMicrobialPitting in Stainless Steel

Newman, R. C.; Wong, Wen‐Kuei; Garner, A.

doi:10.5006/1.3583056

Cited by 39 publications

(22 citation statements)

References 3 publications

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“…In the oil industry, pipelines and equipment are the most vulnerable facilities against microbial corrosion, because of the produced water, hydrostatic testing, and shutdowns [9]. Created pits by bacterial activity clarify localized microbial-influenced corrosion (MIC) in iron alloys [10][11]. The localized pits are usually manifested by the presence of small deep corrosion pits that are covered with corrosion product [12].…”

Section: Introductionmentioning

confidence: 99%

PH effect microbial corrosion of Corten steel and Carbon steel in oily waste water with Pseudomonas Aeruginosa

Mansouri¹

2014

IOSRJEN

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-Microbial corrosion of Corten steel and Carbon steel in oily waste water is investigated in three different PH. Used culture is provided from natural oily waste water and Nutrient Broth culture. Then bacterium is inoculated to culture and electrochemical analyze is done after two weeks. Results show that biofilm doesn't form completely in acidic media, so in these media, medium affect steel directly. In addition, Corten steel has different behavior against bacteria in comparison with Carbon steel because of having Cu in its composition.

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Section: Introductionmentioning

confidence: 99%

PH effect microbial corrosion of Corten steel and Carbon steel in oily waste water with Pseudomonas Aeruginosa

Mansouri¹

2014

IOSRJEN

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“…2,13 For example, Newman, et al, have proposed a mechanism of MIC in which SRB proliferate in the locally anaerobic conditions beneath deposits such as the iron-rich tubercles produced by IOB. 13 Sulfide produced by the SRB then migrates to the edges of the deposits where it is oxidized to thiosulfate, which is a well-known activator of pitting corrosion. Black, sulfide-rich deposits are indeed often found inside the iron-rich tubercles formed by IOB in natural waters.…”

Section: Discussionmentioning

confidence: 98%

“…However, Suleiman, et al, have proposed that ironbased surface films produced by IOB can stabilize pitting by acting as a super-crevice, combining anion-selectivity with a relatively low ionic resistance. 12 Newman, et al, also have proposed a thiosulfateactivated MIC mechanism involving the presence of sulfate-reducing bacteria (SRB) in the locally anaerobic conditions beneath surface deposits, 13 such as the iron-rich tubercles produced by IOB. Black, sulfide-rich material is indeed often found inside the tubercles formed by IOB on SS surfaces.…”

Section: Introductionmentioning

confidence: 96%

Effect of Iron-Oxidizing Bacteria on Pitting of Stainless Steel

Chamritski¹,

Burns²,

Webster³

et al. 2004

CORROSION

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Microbiologically influenced corrosion (MIC) of stainless steel (SS) can be caused by the action of metal-oxidizing bacteria (MOB) in natural, relatively low-chloride waters. This type of corrosion is frequently associated with ennoblement of the open-circuit potential and involves iron-oxidizing bacteria (IOB) and manganese-oxidizing bacteria (MnOB). This work focuses of the role of IOB and associated inorganic water chemistry processes that may cause corrosion of SS. Laboratory and field studies have been conducted to investigate the influence of deposited ferric oxide (or oxyhydroxide) on the corrosion of UNS S30403. Samples exposed to a natural spring water reached open-circuit potentials of 250 mV vs saturated calomel electrode (SCE) and were covered by a biofilm containing a mixture of geothite (α-FeOOH), lepidocrocite (γ-FeOOH), and magnetite (Fe 3 O 4 ) or maghemite (γ-Fe 2 O 3 ), together with low levels of manganese-based deposits. In the laboratory, an iron-based film was formed on some samples by oxidation of ferrous sulfate (FeSO4 ) with calcium hypochlorite (Ca[ClO] 2 ), giving a surface film with a composition similar to that produced by microbial activity. These samples did not show ennoblement, but they did show lower pitting potentials than were measured for control samples. The results of this work are consistent with the idea that MIC of SS in potable water involves manganesebased deposits causing ennoblement (W.H. Dickinson, F. Caccavo Jr.

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“…As aforementioned, when the sample is soaked in the suspension of S. aureus, bacteria adhere to its surface. Their metabolism activity can modify the micro environment on the sample surface, which lowers the corrosion potentials, affects the stability of the passive film and promotes microbiological corrosion accordingly [38][39][40][41]. When a sample has the antimicrobial effect, the adhered bacteria can be killed or suppressed and sedimentary film forms on the surface.…”

Section: The Effect Of La On Corrosion Resistance Of 316lmentioning

confidence: 99%