Protection and mechanism of cerium chemical conversion film against copper corrosion in solution containing sulfate-reducing bacteria

IF 9.6 1区化学 Q1 CHEMISTRY, APPLIED

Journal of Rare Earths Pub Date : 2026-08-01 Epub Date: 2025-09-17 DOI:10.1016/j.jre.2025.09.025

Tianguan Wang, Huixuan Qian, Peng Xu, Shuo Tang, Bo Zhang, Guozhe Meng

{"title":"Protection and mechanism of cerium chemical conversion film against copper corrosion in solution containing sulfate-reducing bacteria","authors":"Tianguan Wang, Huixuan Qian, Peng Xu, Shuo Tang, Bo Zhang, Guozhe Meng","doi":"10.1016/j.jre.2025.09.025","DOIUrl":null,"url":null,"abstract":"<div><div>Copper (Cu) is extensively employed in biofouling control owing to its inherent biocidal properties, however, its limited inhibitory effect against sulfate-reducing bacteria (SRB) can induce rapid localized corrosion and perforation. To mitigate this limitation, cerium chemical conversion films were <em>in situ</em> synthesized on Cu substrates via a chemical conversion approach. This study systematically examined their impact on microbially influenced corrosion (MIC) resistance and elucidated the synergistic dual protection mechanisms. The overlap of the 4f/5d orbitals of cerium promotes a reversible transformation of Ce<sup>3+</sup>/Ce<sup>4+</sup>, which is accompanied by oxygen uptake and release. Under anaerobic SRB-containing conditions, the released atomic oxygen not only sustains passivation at the substrate–film interface but also suppresses SRB adhesion and biofilm formation. Concurrently, the dissolved Ce<sup>4+</sup> ions act as potent oxidants, depriving SRB of vital electrons required for energy metabolism, thereby disrupting their proliferation and mitigating MIC of copper. The work may offer a strategic framework for microbial corrosion prevention of copper alloy for heat exchangers.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2486-2500"},"PeriodicalIF":9.6000,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Rare Earths","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1002072125003370","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/9/17 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}

引用次数: 0

Abstract

Copper (Cu) is extensively employed in biofouling control owing to its inherent biocidal properties, however, its limited inhibitory effect against sulfate-reducing bacteria (SRB) can induce rapid localized corrosion and perforation. To mitigate this limitation, cerium chemical conversion films were in situ synthesized on Cu substrates via a chemical conversion approach. This study systematically examined their impact on microbially influenced corrosion (MIC) resistance and elucidated the synergistic dual protection mechanisms. The overlap of the 4f/5d orbitals of cerium promotes a reversible transformation of Ce³⁺/Ce⁴⁺, which is accompanied by oxygen uptake and release. Under anaerobic SRB-containing conditions, the released atomic oxygen not only sustains passivation at the substrate–film interface but also suppresses SRB adhesion and biofilm formation. Concurrently, the dissolved Ce⁴⁺ ions act as potent oxidants, depriving SRB of vital electrons required for energy metabolism, thereby disrupting their proliferation and mitigating MIC of copper. The work may offer a strategic framework for microbial corrosion prevention of copper alloy for heat exchangers.

Abstract Image

查看原文本刊更多论文

硫酸盐还原菌溶液中铈化学转化膜对铜腐蚀的保护及机理研究

铜（Cu）由于其固有的生物杀灭性能而被广泛应用于生物污染控制中，但其对硫酸盐还原菌（SRB）的抑制作用有限，可能导致快速的局部腐蚀和穿孔。为了减轻这一限制，通过化学转化方法在Cu衬底上原位合成了铈化学转化膜。本研究系统地研究了它们对微生物影响腐蚀（MIC）抗性的影响，并阐明了协同双重保护机制。铈的4f/5d轨道重叠促进了Ce3+/Ce4+的可逆转变，并伴有氧的摄取和释放。在厌氧含SRB条件下，释放的原子氧不仅在基质-膜界面维持钝化，而且抑制SRB的粘附和生物膜的形成。同时，溶解的Ce4+离子作为强氧化剂，剥夺了SRB能量代谢所需的重要电子，从而破坏了它们的增殖，减轻了铜的MIC。本研究为换热器用铜合金的微生物腐蚀防治提供了一个战略框架。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Rare Earths 化学-应用化学

CiteScore

8.70

自引率

14.30%

发文量

374

审稿时长

1.7 months

期刊介绍： The Journal of Rare Earths reports studies on the 17 rare earth elements. It is a unique English-language learned journal that publishes works on various aspects of basic theory and applied science in the field of rare earths (RE). The journal accepts original high-quality original research papers and review articles with inventive content, and complete experimental data. It represents high academic standards and new progress in the RE field. Due to the advantage of abundant RE resources of China, the research on RE develops very actively, and papers on the latest progress in this field emerge every year. It is not only an important resource in which technicians publish and obtain their latest research results on RE, but also an important way of reflecting the updated progress in RE research field. The Journal of Rare Earths covers all research and application of RE rare earths including spectroscopy, luminescence and phosphors, rare earth catalysis, magnetism and magnetic materials, advanced rare earth materials, RE chemistry & hydrometallurgy, RE metallography & pyrometallurgy, RE new materials, RE solid state physics & solid state chemistry, rare earth applications, RE analysis & test, RE geology & ore dressing, etc.