Study on the Effect of Different Cathodic Protection Potentials on the Growth of Mixed Bacteria and Cathodic Protection Efficiency DOI Creative Commons
Zhiwei Zuo, Jie Zhang, Qin Hou

et al.

Chemistry, Journal Year: 2025, Volume and Issue: 7(2), P. 54 - 54

Published: April 1, 2025

Microbiologically influenced corrosion (MIC) is one of the key causes material failure in marine engineering, and sulfate-reducing bacteria (SRB) iron-oxidizing (IOB) are typical representatives anaerobic aerobic microorganisms, respectively. These microorganisms widely present environments can form synergistic communities on surface metal materials, posing a threat to them. At same time, presence mixed may have an effect cathodic protection, so this study investigates growth metabolism SRB IOB under different protection potentials impressed current (ICCP) system environment containing IOB. It also examines attachment these anode cathode, impact efficiency. The results indicate that SRB, efficiency ICCP increases with negative shift potential. A more positive potential promotes adhesion electrode formation biofilm, which reduces In contrast, at −1.05 V (SCE), bacterial inhibited, dense crystalline film primarily composed Fe2O3 Fe(OH)3 forms cathode surface. This effectively protects metal, significantly mitigating MIC.

Language: Английский

Influence of calcium sources on the bio-mineralization behavior of Shewanella putrefaciens and induced microbiologically influenced corrosion inhibition DOI Creative Commons

Yuntian Lou,

Hao Zhang,

Weiwei Chang

et al.

Frontiers in Microbiology, Journal Year: 2025, Volume and Issue: 16

Published: Feb. 25, 2025

The influence of different calcium sources on the mineralization behavior Shewanella putrefaciens and their roles in microbiologically influenced corrosion inhibition (MICI) Q235 carbon steel were investigated. Calcium lactate, nitrate, L-aspartate selected as alternative to assess effects bacterial growth, carbonate deposition, resistance. S. exhibited stable growth all tested media, with pH exceeding 8 after 14 days, promoting precipitation. Under sterile conditions, provided some inhibition, demonstrating most effective protection. In inoculated systems, lactate facilitated formation a continuous CaCO3 mineralized layer, significantly reducing corrosion, whereas nitrate resulted discontinuous deposits, localized corrosion. Electrochemical impedance spectroscopy potentiodynamic polarization analyses confirmed that layers formed enhanced resistance, while exacerbated due nitrate-reducing activity. These findings emphasize crucial role source selection MICI provide insights for optimizing microbial strategies mitigation.

Language: Английский

Citations

0
Study on the Effect of Different Cathodic Protection Potentials on the Growth of Mixed Bacteria and Cathodic Protection Efficiency DOI Creative Commons
Zhiwei Zuo, Jie Zhang, Qin Hou

et al.

Chemistry, Journal Year: 2025, Volume and Issue: 7(2), P. 54 - 54

Published: April 1, 2025

Microbiologically influenced corrosion (MIC) is one of the key causes material failure in marine engineering, and sulfate-reducing bacteria (SRB) iron-oxidizing (IOB) are typical representatives anaerobic aerobic microorganisms, respectively. These microorganisms widely present environments can form synergistic communities on surface metal materials, posing a threat to them. At same time, presence mixed may have an effect cathodic protection, so this study investigates growth metabolism SRB IOB under different protection potentials impressed current (ICCP) system environment containing IOB. It also examines attachment these anode cathode, impact efficiency. The results indicate that SRB, efficiency ICCP increases with negative shift potential. A more positive potential promotes adhesion electrode formation biofilm, which reduces In contrast, at −1.05 V (SCE), bacterial inhibited, dense crystalline film primarily composed Fe2O3 Fe(OH)3 forms cathode surface. This effectively protects metal, significantly mitigating MIC.

Language: Английский

Citations

0