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Corrosion of AISI 304 stainless steel induced by thermophilic sulfate reducing bacteria (SRB) from a geothermal power unit
Author(s) -
TorresSanchez R.,
GarcíaVargas J.,
AlfonsoAlonso A.,
MartínezGómez L.
Publication year - 2001
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/1521-4176(200108)52:8<614::aid-maco614>3.0.co;2-g
Subject(s) - thermophile , corrosion , nuclear chemistry , chemistry , metallurgy , scanning electron microscope , materials science , composite material , biochemistry , enzyme
Corrosion behavior of AISI 304 stainless steel induced by two strains of thermophilic sulfate reducing bacteria (SRB) was analyzed. Inoculated bacteria were isolated from the surface condenser's tubes of “Los Azufres”, a geothermal electric field located in the State of Michoacan in Central Mexico. Anaerobic corrosion tests were carried out for two months in Czapek's medium at 50°C and 90°C inoculated with strains. The examination in scanning electron microscope (SEM) was accomplished to determine the type of corrosion, morphology, and preferential attacked zones. Measuring the corrosion potential and determining of anodic potentiodynamic polarization curves after two months of exposure in anaerobic conditions carried out an electrochemical study.