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The corrosion behavior of 70/30 copper‐zinc alloy under the biofilm of sulfate‐reducing bacteria
Author(s) -
Jing Liu,
Jiashen Zheng,
Liming Xu
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(200111)52:11<833::aid-maco833>3.0.co;2-9
Subject(s) - biofilm , sulfate reducing bacteria , chemistry , corrosion , zinc , nuclear chemistry , dielectric spectroscopy , alloy , copper , metallurgy , bacteria , sulfate , electrochemistry , electrode , materials science , organic chemistry , biology , genetics
A laboratory study was carried out on the effect of the biofilm of sulfate‐reducing bacteria (SRB), which plays an important role in corrosion of 70/30 copper‐zinc alloy in culture media under anaerobic condition. The API medium was used to culture the SRB in Zhongyuan oilfield. Potential/time measurement showed that the presence of SRB makes the corrosion potential more active with SRB growth metabolite. Electrochemical impedance spectroscopy (EIS) was used to analyse the electrode process of 70/30 Cu‐Zn alloy with SRB biofilm. Scanning electron microscopy (SEM) examinations revealed the formation of biofilm and corrosion products during exposure to SRB‐containing culture medium. X‐ray diffraction and EDS were used to analyse the corrosion products. The results show that the variation of activity of the SRB biofilm changes with SRB growth by the linear polarization resistance (R p ) and the EIS in culture medium inoculated SRB.