This paper presents the results of research into corrosion behavior of duplex stainless steel (DSS) 2205
in 0.6M NaCl solution (synthetic seawater) and Postgate B+ microbiological medium, under abiotic and
biotic conditions. The effect of the presence of sulfate reducing bacteria (SRB) on corrosion of DSS
2205 in comparison to abiotic conditions is studied and discussed. Electrochemical tests included the
measurement of open circuit potential (OCP) and anodic polarization scans. These indicated that
electrochemical behavior of DSS 2205 in the biotic condition is considerably different by comparison to
that in the abiotic environment. In particular, the resistance to pitting corrosion of DDS 2205 decreases
with increasing of time exposure to SRB environments.
Keywords: microbiologically influenced corrosion (MIC), sulfate reducing bacteria (SRB),
duplexstainless steel (DSS), marine environment, chloride environment.