高氯离子环境下Sn对新型高cr钢锈层结构的影响

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-04-05 DOI:10.1016/j.matchar.2025.114981

Lizhi Qin , Bingxiao Shi , Feifan Xu , Xuequn Cheng , Chao Liu , Di Xu , Xiaogang Li

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引用次数: 0

摘要

在高浓度Cl−环境下，研究了Sn对高铬合金钢表面锈层结构和形成过程的影响。结果表明，Sn和Cr元素在锈层中共同积累，使锈层的整体电化学阻抗提高了7.4倍，α-FeOOH含量提高了3.2倍。这是由于Sn能够促进锈层中纳米级α-FeOOH晶粒的转变，减少其内部缺陷。进一步详细表征表明，Sn在α-FeOOH和Fe₃O₄晶粒之间的界面处以SnO₂的形式积累。热力学分析表明，Sn的氧化先于其他合金离子发生，导致Cl−浓度降低，从而促进α-FeOOH和Fe₃O₄的成核。

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Effect of Sn on the rust layer structure of new high-Cr-content steels in a high chloride ion concentration environment

The effects of Sn on the structure and formation process of the rust layer on high-Cr alloy steel surfaces are investigated in an environment with high Cl⁻ concentration. The results show that Sn and Cr elements jointly accumulate in the rust layer, improving the overall electrochemical impedance of the rust layer by 7.4 times and increasing the α-FeOOH content by 3.2 times. This is attributed to Sn’s ability to promote the transformation of nanoscale α-FeOOH grains in the rust layer, reducing defects within it. Furthermore, detailed characterization reveals that Sn accumulates as SnO₂ at the interface between α-FeOOH and Fe₃O₄ grains. Thermodynamic analysis indicates that the oxidation of Sn occurs before other alloy ions, leading to a reduction in Cl⁻ concentration and thereby promoting the nucleation of α-FeOOH and Fe₃O₄.

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.