The effects of Methanococcus maripaludis on the corrosion behavior of EH40 steel in seawater

Chen, Shiqiang; Deng, Hao; Zhao, Youjian; Lu, Shihang; Zhao, Yao; Cheng, Xiao‐Chun; Liu, Guangzhou; Dou, Wenwen; Chen, Jvna

doi:10.1016/j.bioelechem.2021.107824

Cited by 19 publications

(3 citation statements)

References 39 publications

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“…Moreover, R ct values decreased rapidly at 4 and 5 d due to the breach of a protective layer, which was consistent with the Nyquist plots. After a 1-day immersion, the radii of capacitive loops in the PASP + GLU group were much larger than those in other groups, suggesting the improved corrosion inhibition in the presence of PASP + GLU . The radii reached their maximum at 3 d and then decreased at 4 and 5 d, which was attributed to the breach of the protective layer .…”

Section: Resultsmentioning

confidence: 89%

“…After a 1-day immersion, the radii of capacitive loops in the PASP + GLU group were much larger than those in other groups, suggesting the improved corrosion inhibition in the presence of PASP + GLU. 37 The radii reached their maximum at 3 d and then decreased at 4 and 5 d, which was attributed to the breach of the protective layer. 38 It is worth noting that a smaller radius was detected in the PASP + GLU group than that in the PASP group at 2 h, indicating that less PASP was attached to the coupon surface in the presence of GLU.…”

Section: Resultsmentioning

confidence: 95%

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Glutamic Acid Enhances the Corrosion Inhibition of Polyaspartic Acid on Q235 Carbon Steel

Gong,

Li,

et al. 2023

ACS Omega

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Currently, poly(aspartic acid) (PASP) is used with traditional toxic agents for corrosion inhibition, which greatly reduces the environmental significance of PASP as a green inhibitor. Amino acids, small-molecule compounds with amino and carboxyl groups, may react with PASP and act as chains to link PASP molecules, which might enhance the inhibition of PASP on metal corrosion. In this study, we selected glutamic acid (GLU) as a typical amino acid to explore the potential synergistic effect of the amino acid and PASP on corrosion inhibition via electrochemical experiments and molecular dynamics simulation. The corrosion inhibition of PASP was promoted by GLU with less weight loss and less pitting. The results of molecular dynamics simulation showed that GLU could bind with PASP at carboxyl groups and amino groups via donor–acceptor interactions and accelerate the diffusion of PASP to the carbon steel surface. Furthermore, the binding between PASP and the carbon steel surface can be enhanced by GLU, resulting in a dense and stable protective film. To the best of our knowledge, this is the first investigation into the mechanism of an amino acid as an enhancer to improve corrosion inhibition. This work provides a new strategy to enhance existing green inhibitors, which would significantly reduce the cost of cooling water treatment and its adverse environmental impacts.

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Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 95%

Glutamic Acid Enhances the Corrosion Inhibition of Polyaspartic Acid on Q235 Carbon Steel

Gong,

Li,

et al. 2023

ACS Omega

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“…Figure 5a 5) indicated that time constants such as protective film formation and charge-transfer process should be presented, 34 and there are at least two similar relaxation times of time constants during the corrosion of A3 carbon steel. 35,36 As shown in Figure 5a−c, the semicircle diameter in the Nyquist plots was significantly larger than that without s-EPS (Figure 5a), indicating that the charge-transfer resistance and corrosion inhibition rate were increased with s-EPS. 17 Additionally, by a comparation with Figure 5a′, the increased peak heights of Bode plots in Figure 5b′,c′ indicated that protective films were formed with the addition of s-EPS, 33 leading to corrosion inhibition of A3 carbon steel in circulating cooling water.…”

Section: Evaluation Of S-eps Anticorrosion Performance the Corrosion ...mentioning

confidence: 95%

Roles of Microbial Extracellular Polymeric Substances in Corrosion and Scale Inhibition of Circulating Cooling Water

Gong

Song

et al. 2023

ACS EST Water

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Circulating cooling water plays a major role in petrochemical electric power, steel, metallurgical, and other industries. Corrosion and scale inhibitors in circulating cooling water systems face the challenges of high cost, low efficiency, and heavy pollution. Extracellular polymeric substances (EPS) were considered as novel, efficient, and environmentally friendly corrosion and scale inhibitors in circulating cooling water systems due to their availability, high efficiency, and lack of benefit from secondary pollution. However, roles of EPS in corrosion and scale inhibition remain unknown yet. Herein, Gram-negative (Pseudomonas putida) and Gram-positive (Bacillus megaterium) bacteria were selected to explore the corrosion and scale performance and mechanisms of soluble EPS (s-EPS). Performances of s-EPS from P. putida (s-EPS-P. putida) in corrosion and scale inhibition were obviously superior to those of s-EPS from B. megaterium (s-EPS-B. megaterium). The previously undiscovered roles of s-EPS in corrosion and scale were uncovered: (1) the chelating ability of s-EPS (mainly humic substances) prevented the formation and growth of CaCO 3 crystals; (2) s-EPS (mainly carbohydrates) formed a dense protective film by integrating with metal ions on a carbon steel surface to prevent the corrosion of A3 carbon steel. Our work provides a deeper mechanistic understanding of corrosion and scale inhibitory performances, allowing advanced development and optimization of s-EPS as a corrosion and scale inhibitor.

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Evaluating the use of unassimilated bio‐anode with different exposed surface areas for bioenergy production using solar‐powered microbial electrolysis cell

et al. 2021

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The microbial electrolysis cell (MEC) is an emerging technology for bioenergy production using organic wastewater. Normally, a preassimilated bio-anode is utilized by the MEC to break down the organic content, but the formation and assimilation of microbial community at the anode surface is a time-consuming process. This study utilized a novel unassimilated Ni-foam anode for the first time in solar-powered MEC for bioenergy production. Synthetic dairy manure wastewater (SDMW) was used both as substrate and an inoculum in the solarpowered tubular MEC. The impacts of the exposed surface area of the bio-anode on bioenergy production were evaluated by utilizing two different separation techniques (rate-limited bio-anode -MEC and fully exposed bio-anode -MEC). The former technique achieves a maximum methane production rate of 30.35 ± 0.03 mL/L, 14.2% more than that achieved by the later mentioned technique (26.4 ± 0.05 mL/L). Hydrogen production was approximately 800 ± 5 mm 3 in both experimentations. The maximum generated current in the rate limited bioanode -MEC was 35.5 mA. Scanning electron microscope images confirmed the formation of rod-shaped along with round-shaped microbial communities on the anode surface, and, interestingly, round-shaped bacteria were also grown on the cathode surface. The bioenergy (H 2 and CH 4 ) produced using SDMW within first 13 days of operation, along with the formation of a microbial community, was a significant success in this area and has opened up many research opportunities for producing instant bioenergy from organic waste.

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The effects of Methanococcus maripaludis on the corrosion behavior of EH40 steel in seawater

Cited by 19 publications

References 39 publications

Glutamic Acid Enhances the Corrosion Inhibition of Polyaspartic Acid on Q235 Carbon Steel

Glutamic Acid Enhances the Corrosion Inhibition of Polyaspartic Acid on Q235 Carbon Steel

Roles of Microbial Extracellular Polymeric Substances in Corrosion and Scale Inhibition of Circulating Cooling Water

Evaluating the use of unassimilated bio‐anode with different exposed surface areas for bioenergy production using solar‐powered microbial electrolysis cell

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