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Titolo:
Carbon steel corrosion by iron oxidising and sulphate reducing bacteria ina freshwater cooling system
Autore:
Rao, TS; Sairam, TN; Viswanathan, B; Nair, KVK;
Indirizzi:
Marine Biol Programme, Water & Steam Chem Lab, Kalpakkam 603102, Tamil Nadu, India Marine Biol Programme Kalpakkam Tamil Nadu India 603102 Tamil Nadu, India Indira Gandhi Ctr Atom Res, Div Mat Sci, Kalpakkam 603102, Tamil Nadu, India Indira Gandhi Ctr Atom Res Kalpakkam Tamil Nadu India 603102 Nadu, India Natl Inst Ocean Technol, Chennai 600036, India Natl Inst Ocean Technol Chennai India 600036 hnol, Chennai 600036, India
Titolo Testata:
CORROSION SCIENCE
fascicolo: 8, volume: 42, anno: 2000,
pagine: 1417 - 1431
SICI:
0010-938X(200008)42:8<1417:CSCBIO>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOSSBAUER;
Keywords:
iron; oxidation; microbiological corrosion;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Rao, TS Marine Biol Programme, Water & Steam Chem Lab, BARC Facil, Kalpakkam 603102, Tamil Nadu, India Marine Biol Programme BARC Facil Kalpakkam Tamil Nadu India 603102
Citazione:
T.S. Rao et al., "Carbon steel corrosion by iron oxidising and sulphate reducing bacteria ina freshwater cooling system", CORROS SCI, 42(8), 2000, pp. 1417-1431

Abstract

Microbiologically influenced corrosion of carbon steel has been investigated. Carbon steel coupons were exposed online in the cooling water system ofa nuclear test reactor to assess the microbial growth on the coupons and the corrosion phenomena. Iron bacteria, sulphate reducing bacteria (SRB) andculturable aerobic heterotrophic bacteria (CAHB) were monitored both on the coupons and in the cooling water. Corrosion rate was assayed by weight loss method and corrosion products analysed by XRD and Mossbauer spectroscopy. Extensive tuberculation of carbon steel coupons was noticed. SEM picturesrevealed the presence of ensheathed filamentous iron bacteria encrusted with corrosion products. Beneath the tubercles significant pitting and SRB induced corrosion in the form of concentric rings was observed. From the phase analysis, the following compounds were found to be present: gamma-Fe2O3, Fe2PO5, FePS3, Fe(PO3)(3) and BaFeO3-x. From the present study it is inferred that iron bacteria (Leptothrix sp.) and SRB (Desulfovibrio sp.) are responsible for the corrosion of carbon steel. The role of these bacteria in influencing the corrosion of carbon steel is highlighted. (C) 2000 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 10:40:18