{"title":"Inhibition of microbiologically influenced corrosion in 90/10 CuNi alloy by a novel antibacterial peptide","authors":"Nianting Xue, Hao Sun, Shihang Lu, Yizhen Yu, Wenyan Ma, Guangzhou Liu, Wenwen Dou","doi":"10.1016/j.bioelechem.2025.109114","DOIUrl":null,"url":null,"abstract":"<div><div>Microbiologically influenced corrosion (MIC) poses a serious threat to the structural integrity of Cu<img>Ni alloys under marine service conditions. This study proposed a novel antibacterial peptide (Tcs) combined with Alkyl Dimethyl Benzyl Ammonium Chloride (ADBAC) to inhibit MIC in 90/10 Cu<img>Ni alloy induced by <em>Desulfovibrio ferrophilus</em> IS5. Bacterial counts, environmental parameters analysis, surface morphological analyses, weight loss measurements, and electrochemical tests were conducted, through which the antibacterial and corrosion inhibition effects were demonstrated. The results showed that 180 ppb Peptide Tcs (180 Tcs) alone exerted almost no inhibitory effect on <em>D. ferrophilus</em> IS5, whereas a significant concentration-dependent enhancement was observed when Peptide Tcs was combined with 20 ppm ADBAC (20 ADBAC). Specifically, the 20 ppm ADBAC +180 ppb Peptide Tcs (20 ADBAC-180 Tcs) combination further reduced sessile bacterial counts by one order of magnitude compared to 20 ADBAC alone, while the weight loss rate and maximum pitting depth decreased by approximately 86 % and 61 %, respectively. These findings provide new insights into optimizing traditional biocide systems with small antimicrobial peptides and developing green, efficient strategies for controlling marine MIC.</div></div>","PeriodicalId":252,"journal":{"name":"Bioelectrochemistry","volume":"168 ","pages":"Article 109114"},"PeriodicalIF":4.5000,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bioelectrochemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1567539425002178","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Microbiologically influenced corrosion (MIC) poses a serious threat to the structural integrity of CuNi alloys under marine service conditions. This study proposed a novel antibacterial peptide (Tcs) combined with Alkyl Dimethyl Benzyl Ammonium Chloride (ADBAC) to inhibit MIC in 90/10 CuNi alloy induced by Desulfovibrio ferrophilus IS5. Bacterial counts, environmental parameters analysis, surface morphological analyses, weight loss measurements, and electrochemical tests were conducted, through which the antibacterial and corrosion inhibition effects were demonstrated. The results showed that 180 ppb Peptide Tcs (180 Tcs) alone exerted almost no inhibitory effect on D. ferrophilus IS5, whereas a significant concentration-dependent enhancement was observed when Peptide Tcs was combined with 20 ppm ADBAC (20 ADBAC). Specifically, the 20 ppm ADBAC +180 ppb Peptide Tcs (20 ADBAC-180 Tcs) combination further reduced sessile bacterial counts by one order of magnitude compared to 20 ADBAC alone, while the weight loss rate and maximum pitting depth decreased by approximately 86 % and 61 %, respectively. These findings provide new insights into optimizing traditional biocide systems with small antimicrobial peptides and developing green, efficient strategies for controlling marine MIC.
期刊介绍:
An International Journal Devoted to Electrochemical Aspects of Biology and Biological Aspects of Electrochemistry
Bioelectrochemistry is an international journal devoted to electrochemical principles in biology and biological aspects of electrochemistry. It publishes experimental and theoretical papers dealing with the electrochemical aspects of:
• Electrified interfaces (electric double layers, adsorption, electron transfer, protein electrochemistry, basic principles of biosensors, biosensor interfaces and bio-nanosensor design and construction.
• Electric and magnetic field effects (field-dependent processes, field interactions with molecules, intramolecular field effects, sensory systems for electric and magnetic fields, molecular and cellular mechanisms)
• Bioenergetics and signal transduction (energy conversion, photosynthetic and visual membranes)
• Biomembranes and model membranes (thermodynamics and mechanics, membrane transport, electroporation, fusion and insertion)
• Electrochemical applications in medicine and biotechnology (drug delivery and gene transfer to cells and tissues, iontophoresis, skin electroporation, injury and repair).
• Organization and use of arrays in-vitro and in-vivo, including as part of feedback control.
• Electrochemical interrogation of biofilms as generated by microorganisms and tissue reaction associated with medical implants.