生物膜对FeCoNiCrMn高熵合金的微生物影响腐蚀
Microbiologically influenced corrosion of FeCoNiCrMn high-entropy alloys by biofilm.
作者信息
Yang Jike, Zhang Yu, Chang Weiwei, Lou Yuntian, Qian Hongchang
机构信息
Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, China.
National Materials Corrosion and Protection Data Center, University of Science and Technology Beijing, Beijing, China.
出版信息
Front Microbiol. 2022 Oct 10;13:1009310. doi: 10.3389/fmicb.2022.1009310. eCollection 2022.
is widely found in industrial water and seawater. Microbiologically influenced corrosion (MIC) caused by is a serious threat and damage to the safe service of steel materials. In this study, the MIC behavior of FeCoNiCrMn high-entropy alloy (HEA) by biofilm was investigated in the simulated marine medium. The maximum pitting depth of the HEA coupons in the -inoculated medium was ~4.77 μm, which was 1.5 times that in the sterile medium. EIS and potentiodynamic polarization results indicated that biofilm reduced the corrosion resistance of the passive film of HEA coupons and promoted its anodic dissolution process. XPS and AES results further demonstrated that interfered with the distribution of elements in the passive film and significantly promoted the dissolution of Fe.
广泛存在于工业用水和海水中。由[具体微生物]引起的微生物影响腐蚀（MIC）对钢铁材料的安全服役构成严重威胁并造成损害。在本研究中，在模拟海洋介质中研究了[具体微生物]生物膜对FeCoNiCrMn高熵合金（HEA）的MIC行为。在接种[具体微生物]的介质中，HEA试片的最大点蚀深度约为4.77μm，是无菌介质中的1.5倍。电化学阻抗谱（EIS）和动电位极化结果表明，[具体微生物]生物膜降低了HEA试片钝化膜的耐蚀性并促进了其阳极溶解过程。X射线光电子能谱（XPS）和俄歇电子能谱（AES）结果进一步表明，[具体微生物]干扰了钝化膜中元素的分布并显著促进了Fe的溶解。
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