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Mechanism of Biocorrosion Caused by Biofilms and Its Mitigation

Liu, Jialin
http://orcid.org/0000-0002-5040-456X
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1511966633638842

Abstract Details

2017, Master of Science (MS), Ohio University, Biomedical Engineering (Engineering and Technology).
The awareness of biocorrosion, also known as microbiologically influenced corrosion (MIC) increased rapidly in the past decade in many fields such as the oil and gas industry, water utilities, and the biomedical implant industry. MIC can cause severe corrosion of medical devices. To minimize the effect of MIC, in this study, the mechanisms of MIC and a novel antimicrobial Cu-bearing stainless steel were investigated. For the mechanistic study, two types of MIC mechanisms of Desulfovibrio vulgaris against carbon steel and copper were verified in this study. It was demonstrated that the mechanism of D. vulgaris corroding carbon steel was extracellular electron transfer MIC (EET-MIC). Copper was corroded by D. vulgaris because of its secreted metabolites, which can be called metabolite-MIC (M-MIC). The concentration effect of riboflavin (an electron mediator) on the corrosion rate of D. vulgaris against carbon steel was investigated. The results clearly showed that the corrosion rate and pit depth were continuously increased by higher concentrations of riboflavin. The antimicrobial ability and anticorrosion ability of a novel Cu-bearing 2205 duplex stainless steel (2205-Cu DSS) against nitrate reducing Pseudomonas aeruginosa biofilm was also investigated. The results show that 2205-Cu DSS reduced sessile cell count and corrosion rate by 99.5% and 64.1%, respectively, compared with 2205 DSS.
Tingyue Gu (Advisor)
101 p.
Biochemistry; Biomedical Engineering; Microbiology
2205-Cu duplex stainless steel; Pseudomonas aeruginosa; Desulfovibrio vulgaris; Microbiologically influenced corrosion; Biofilm; Antimicrobial; mechanism;

Recommended Citations

Citations

  • Liu, J. (2017). Mechanism of Biocorrosion Caused by Biofilms and Its Mitigation [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1511966633638842

    APA Style (7th edition)

  • Liu, Jialin. Mechanism of Biocorrosion Caused by Biofilms and Its Mitigation. 2017. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1511966633638842.

    MLA Style (8th edition)

  • Liu, Jialin. "Mechanism of Biocorrosion Caused by Biofilms and Its Mitigation." Master's thesis, Ohio University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1511966633638842

    Chicago Manual of Style (17th edition)

ohiou1511966633638842
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© 2017, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.