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Corrosion behavior of low‐alloy steel in the presence of Desulfovibrio caledoniensis
Author(s) -
Cetin D.,
Aksu M. L.
Publication year - 2013
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/maco.201106142
Subject(s) - tafel equation , corrosion , sulfate reducing bacteria , metallurgy , alloy , cathodic protection , incubation , desulfovibrio , alloy steel , diffusion , chemistry , incubation period , sulfate , materials science , electrochemistry , biochemistry , electrode , physics , thermodynamics
Abstract Sulfate‐reducing bacteria (SRB) are shown to be common inhabitants of oil reservoirs. Desulfovibrio caledoniensis isolated from a production well was used in this study. After an incubation period of 1 month with the SRB culture, two layers of corrosion products with different compositions were detected on the test coupons. The Tafel plots showed that the corrosion potential exhibited a cathodic shift and the corrosion rates increased with the incubation time. The analysis of the Nyquist diagrams revealed that the diffusion process begins to dominate with time in bacteria containing medium. These results are in good accordance with the Tafel data.