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Titolo:
Electrochemical studies on biocorrosion of AISI type 304 SS in fresh water
Autore:
George, RP; Muraleedharan, P; Parvathavarthini, N; Gnanamoorthy, JB; Rao, TS; Nair, KVK;
Indirizzi:
Indira Gandhi Ctr Atom Res, Div Met, Kalpakkam 603102, Tamil Nadu, India Indira Gandhi Ctr Atom Res Kalpakkam Tamil Nadu India 603102 Nadu, India Indira Gandhi Ctr Atom Res, Water & Steam Chem Lab, Kalpakkam 603102, Tamil Indira Gandhi Ctr Atom Res Kalpakkam Tamil Nadu India 603102 03102, Tamil
Titolo Testata:
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
fascicolo: 5, volume: 51, anno: 1998,
pagine: 331 - 335
SICI:
0972-2815(199810)51:5<331:ESOBOA>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
SULFATE-REDUCING BACTERIA; STAINLESS-STEEL; CORROSION; SEAWATER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: George, RP Indira Gandhi Ctr Atom Res, Div Met, Kalpakkam 603102, Tamil Nadu, India Indira Gandhi Ctr Atom Res Kalpakkam Tamil Nadu India 603102 a
Citazione:
R.P. George et al., "Electrochemical studies on biocorrosion of AISI type 304 SS in fresh water", T I INST ME, 51(5), 1998, pp. 331-335

Abstract

Biofilms formed on stainless steel on exposure to aquatic environments canconsiderably raise the corrosion potential in the anodic direction, leading to pitting. In this study an attempt has been made to understand the influence of biofilms formed by microorganisms on the corrosion behaviour of stainless steel (SS) in various freak water environments using electrochemical techniques. Open circuit potential (OCP) and cyclic potentiodynamic polarization studies were carried out with freshly polished coupons of SS in open reservoir water, Palar water and reservoir water sterilized by filtering and exposing to UV light. Polarization studies were also carried out using coupons with biofilms developed ii, open reservoir water under normal day and night conditions and continuous dark conditions. Studies on the variations in the OCP of SS with time in reservoir water and sterile reservoir water showed that formation of biofilm in the reservoir water raised the OCP ofSS for about 200 mV (SCE) compared to that in sterile water. Comparitive studies on the polarization curves of freshly polished SS and SS with various types of biofilms developed in the natural environment showed that biofilm formed in the open reservoir under normal day and night conditions with maximum density of bacteria and alga increased the OCP and the pitting potential compared to the freshly polished specimens. However, as the exposure rime increased in the open reservoir, passive current of the SS increased toa stage where a well-defined passive region was absent on coupons with 123day old biofilm.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 12:15:16