TY - GEN
T1 - Hydrogen damage of duplex stainless steel in the presence sulphate-reducing bacteria
AU - Michalska, Joanna
AU - Łabanowski, Jerzy
AU - Jaworska-Kik, Marzena
AU - Socha, Robert
PY - 2013
Y1 - 2013
N2 - Microbially influenced corrosion (MIC) has been focusing increasing attention in the last years, as an answer to the demand of wide variety of degradation cases. Different MIC mechanisms can be simultaneously or alternately occuring, where a complex boundary layer of corrosion products, bacterial cells and other environmental factors are present on the surface. The special role of bacteria in enhancing corrosion of metals can also be connected with hydrogen interactions. Biological production of hydrogen is a complex phenomenon associated with many different groups of microorganisms. Sulfate-reducing bacteria (SRBs) are capable of producing relatively large amounts of hydrogen sulfide in the their biofilms that come to coat nearly all unprotected metal surfaces in a moist environment. Because hydrogen sulphide is recognized as the most effective promoter of hydrogen entry into metals and sulfide ions are known to enhance pitting, there is a high risk of metal damage in the environments containing SRBs. However, the role of SRB in hydrogen degradation of metallic materials is not fully understood and the limited numbers of publications can be found in the literature, especially in a relation to the highly alloyed steels, for which this phenomenon can be particularly harmful. The present work presents the combined results of MIC and hydrogen-induced corrosion studies on 2205 duplex stainless steel (dSS) after the exposition to Desulfovibrio desulfurican species. Microbiologically evolved hydrogen effect on corrosion resistance of DSS was assessed in two ways. First, the role of SRBs and hydrogen in pitting development was examined by electrochemical polarization studies. Changes in the passive layers induced by SRBs were confirmed by XPS analyses. Secondly, the possibility of hydrogen embrittlement were examined by slow strain rate (SSRT) testing of steel investigated in the presence of SRBs. Microscopic studies were performed to establish the role of microstructure and chemical composition of steel in microbial-enhanced damaging. In addition to this, the principal morphologies of attack and cracking were described.
AB - Microbially influenced corrosion (MIC) has been focusing increasing attention in the last years, as an answer to the demand of wide variety of degradation cases. Different MIC mechanisms can be simultaneously or alternately occuring, where a complex boundary layer of corrosion products, bacterial cells and other environmental factors are present on the surface. The special role of bacteria in enhancing corrosion of metals can also be connected with hydrogen interactions. Biological production of hydrogen is a complex phenomenon associated with many different groups of microorganisms. Sulfate-reducing bacteria (SRBs) are capable of producing relatively large amounts of hydrogen sulfide in the their biofilms that come to coat nearly all unprotected metal surfaces in a moist environment. Because hydrogen sulphide is recognized as the most effective promoter of hydrogen entry into metals and sulfide ions are known to enhance pitting, there is a high risk of metal damage in the environments containing SRBs. However, the role of SRB in hydrogen degradation of metallic materials is not fully understood and the limited numbers of publications can be found in the literature, especially in a relation to the highly alloyed steels, for which this phenomenon can be particularly harmful. The present work presents the combined results of MIC and hydrogen-induced corrosion studies on 2205 duplex stainless steel (dSS) after the exposition to Desulfovibrio desulfurican species. Microbiologically evolved hydrogen effect on corrosion resistance of DSS was assessed in two ways. First, the role of SRBs and hydrogen in pitting development was examined by electrochemical polarization studies. Changes in the passive layers induced by SRBs were confirmed by XPS analyses. Secondly, the possibility of hydrogen embrittlement were examined by slow strain rate (SSRT) testing of steel investigated in the presence of SRBs. Microscopic studies were performed to establish the role of microstructure and chemical composition of steel in microbial-enhanced damaging. In addition to this, the principal morphologies of attack and cracking were described.
UR - https://www.scopus.com/pages/publications/84898713885
M3 - Conference contribution
AN - SCOPUS:84898713885
SN - 9789899885004
T3 - EUROCORR 2013 - European Corrosion Congress
BT - EUROCORR 2013 - European Corrosion Congress
T2 - European Corrosion Congress, EUROCORR 2013
Y2 - 1 September 2013 through 5 September 2013
ER -