The effect of riboflavin on the microbiologically influenced corrosion of pure iron by Shewanella oneidensis MR-1
Weiwei Chang (University of Science and Technology Beijing)
Yangyang Li (University of Science and Technology Beijing)
Ziyu Li (TU Delft - Team Arjan Mol)
Yuntian Lou (University of Science and Technology Beijing)
Tianyu Cui (University of Science and Technology Beijing)
Hongchang Qian (University of Science and Technology Beijing)
J. M C Mol (TU Delft - Team Arjan Mol)
Dawei Zhang (University of Science and Technology Beijing)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
The microbiologically influenced corrosion of pure iron was investigated in the presence of Shewanella oneidensis MR-1 with various levels of exogenous riboflavin (RF) serving as electron shuttles for extracellular electron transfer (EET). With more RF available, a larger and denser phosphate layer was formed on the surface of pure iron by the bacteria. The results of electrochemical impedance spectroscopy, linear polarization resistance and potentiodynamic polarization tests showed that the product layer provided good corrosion protection to the pure iron. Using electrochemical noise, we observed that the addition of RF accelerated the corrosion at the initial stage of immersion, thereby accelerating the deposition of products to form a protective layer subsequently.