{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,3]],"date-time":"2026-03-03T01:34:34Z","timestamp":1772501674154,"version":"3.50.1"},"reference-count":63,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2025,4,2]],"date-time":"2025-04-02T00:00:00Z","timestamp":1743552000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Natural Science Foundation of Shandong Province","award":["ZR2023MD024"],"award-info":[{"award-number":["ZR2023MD024"]}]},{"name":"Natural Science Foundation of Shandong Province","award":["42476209"],"award-info":[{"award-number":["42476209"]}]},{"name":"Natural Science Foundation of Shandong Province","award":["2023GXNSFBA026252"],"award-info":[{"award-number":["2023GXNSFBA026252"]}]},{"name":"National Natural Science Fund of China","award":["ZR2023MD024"],"award-info":[{"award-number":["ZR2023MD024"]}]},{"name":"National Natural Science Fund of China","award":["42476209"],"award-info":[{"award-number":["42476209"]}]},{"name":"National Natural Science Fund of China","award":["2023GXNSFBA026252"],"award-info":[{"award-number":["2023GXNSFBA026252"]}]},{"name":"Youth Science Foundation of Guangxi province","award":["ZR2023MD024"],"award-info":[{"award-number":["ZR2023MD024"]}]},{"name":"Youth Science Foundation of Guangxi province","award":["42476209"],"award-info":[{"award-number":["42476209"]}]},{"name":"Youth Science Foundation of Guangxi province","award":["2023GXNSFBA026252"],"award-info":[{"award-number":["2023GXNSFBA026252"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Microbially influenced corrosion (MIC) in anaerobic environments accounts for many severe failures and losses in different industries. Sulfate-reducing bacteria (SRB) represent a typical class of corrosive microorganisms capable of acquiring electrons from steel through extracellular electron transfer processes, thereby inducing severe electrical microbially influenced corrosion (EMIC). Although prior research has underscored the significance of extracellular electron transfer, the contribution of EMIC to the whole MIC has not been comprehensively studied. In this study, Q235 steel coupons were employed in an H-shaped electrochemical cell to conduct electrochemical and coupon immersion experiments, aiming to determine the contribution of EMIC to the overall MIC. The experiments were conducted under two distinct carbon source conditions: 100% carbon source (CS) and 1% CS environments. It was observed that the biotic electrodes exhibited significantly higher cathodic currents, with the most pronounced biological cathodic activity detected in the 100% CS biotic medium. The voltammetric responses of the electrodes before and after changes in the medium confirmed the biocatalytic capability of the attached biofilm in stimulating the cathodic reaction. The proportion of EMIC in MIC was calculated using linear polarization resistance, revealing a trend over time. Additionally, weight loss tests indicated that the contribution of EMIC to the total MIC was approximately 27.69%. Furthermore, the results demonstrated that while the overall corrosion rate was lower in the 1% CS environment, the proportion of EMIC in MIC increased to approximately 37.68%.<\/jats:p>","DOI":"10.3390\/ma18071613","type":"journal-article","created":{"date-parts":[[2025,4,2]],"date-time":"2025-04-02T07:47:44Z","timestamp":1743580064000},"page":"1613","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Distinguishing the Contribution of Extracellular Electron Transfer in the Desulfovibrio caledoniensis-Induced Total Corrosion of Q235 Carbon Steel"],"prefix":"10.3390","volume":"18","author":[{"given":"Keliang","family":"Fan","sequence":"first","affiliation":[{"name":"Department of Bioengineering, Qilu University of Technology, Jinan 250353, China"},{"name":"State Key Laboratory of Advanced Marine Materials, Institute of Oceanology Chinese Academy of Sciences, Qingdao 266071, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9492-0072","authenticated-orcid":false,"given":"Fang","family":"Guan","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Advanced Marine Materials, Institute of Oceanology Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"Guangxi Key Laboratory of Marine Environmental Science, Institute of Marine Corrosion Protection, Guangxi Academy of Sciences, 98 Daling Road, Nanning 530007, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4786-1946","authenticated-orcid":false,"given":"Xiaofan","family":"Zhai","sequence":"additional","affiliation":[{"name":"Department of Bioengineering, Qilu University of Technology, Jinan 250353, China"},{"name":"State Key Laboratory of Advanced Marine Materials, Institute of Oceanology Chinese Academy of Sciences, Qingdao 266071, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guanhua","family":"Jiao","sequence":"additional","affiliation":[{"name":"Department of Bioengineering, Qilu University of Technology, Jinan 250353, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yugang","family":"Sang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Advanced Marine Materials, Institute of Oceanology Chinese Academy of Sciences, Qingdao 266071, China"},{"name":"Department of Materials Science and Engineering, Qilu University of Technology, Jinan 250353, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Min","family":"Jing","sequence":"additional","affiliation":[{"name":"College of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7458-4729","authenticated-orcid":false,"given":"Jizhou","family":"Duan","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Advanced Marine Materials, Institute of Oceanology Chinese Academy of Sciences, Qingdao 266071, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,4,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"128","DOI":"10.1021\/ie50016a003","article-title":"Bacterial Activity as a Corrosive Influence in the Soil","volume":"2","author":"Gaines","year":"1910","journal-title":"J. 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