Corrosive activity of natural microbial associations at various conditions of cultivation

Rodin, V. B.; Zhigletsova, S. K.; Zhirkova, N. A.; Aleksandrova, N. V.; Чугунов, В. А.; Kholodenko, V. P.

doi:10.1134/s0003683811060111

Cited by 1 publication

(1 citation statement)

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“…Because of this complexity, generalizing the data available in the literature has been difficult. Rodin et al [28] previously showed that diverse bacterial consortia that include SRBs have a corrosive or protective effect on steel according to theculture conditions. Various studies have shown that IRBs-in combination with SRBs-have a protective effect on steel [8,21], but other studies have shown that IRBs enhance the corrosive effect of SRBs [33,35].…”

Section: Discussionmentioning

confidence: 99%

Effects of Iron-Reducing Bacteria on Carbon Steel Corrosion Induced by Thermophilic Sulfate-Reducing Consortia

Valencia-Cantero¹,

Peña‐Cabriales²

2014

Journal of Microbiology and Biotechnology

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Four thermophilic bacterial species, including the iron-reducing bacterium Geobacillus sp. G2 and the sulfate-reducing bacterium Desulfotomaculum sp. SRB-M, were employed to integrate a bacterial consortium. A second consortium was integrated with the same bacteria, except for Geobacillus sp. G2. Carbon steel coupons were subjected to batch cultures of both consortia. The corrosion induced by the complete consortium was 10 times higher than that induced by the second consortium, and the ferrous ion concentration was consistently higher in iron-reducing consortia. Scanning electronic microscopy analysis of the carbon steel surface showed mineral films colonized by bacteria. The complete consortium caused profuse fracturing of the mineral film, whereas the non-iron-reducing consortium did not generate fractures. These data show that the iron-reducing activity of Geobacillus sp. G2 promotes fracturing of mineral films, thereby increasing steel corrosion.

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