首页|Nitrogen-induced optimization of corrosion resistance for nanocrystalline soft magnetic Fe-Zr-B alloys

Nitrogen-induced optimization of corrosion resistance for nanocrystalline soft magnetic Fe-Zr-B alloys

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The poor corrosion resistance restricts the industrial applications of nanocrystalline soft magnetic Fe-Zr-B alloys.We reported a facile plasma-nitriding surface process to enhance the corrosion resistance of a nanocrystalline Fe90Zr7B3 alloy without deteriorating its soft magnetic properties.Potentiodynamic po-larization and electrochemical impedance spectroscopy were performed to investigate the corrosion be-havior.The nitrided alloy shows higher corrosion resistance than the untreated alloy,as evidenced by a nobler corrosion potential,lower corrosion current and higher polarization resistance of surface corrosion film,while their magnetic properties are similar.The microstructures of both nanocrystalline alloys were examined by high-resolution transmission electron microscopy(HRTEM)and the compositions of their corrosion films analyzed by X-ray photoelectron spectroscopy(XPS).For the nitrided alloy,a more homo-geneous nanocrystalline structure developed in the surface nitrided layer containing corrosion-resistant nitride phases(Fe3N and ZrN)provides a higher resistance against chloride corrosion.Moreover,the ni-trided layer facilitates the formation of a more protective corrosion film with the increased ratios of Fe2+/Fe3+and O2-/OH-as well as higher enrichment of Zr-and B-oxides,while the N-species(NH4+and NO3-)formed in the corrosion film behave as good corrosion inhibitors and further enhance the film pro-tection.Our findings provide a simple strategy for the preparation of corrosion-resistant nanocrystalline soft magnetic alloys to satisfy a variety of engineering requirements.

Plasma-nitridingNanocrystalline soft magnetic Fe-based alloysCorrosion resistanceCorrosion film

Haoran Ma、Wenquan Wang、Yanxin Liu、Xiahe Liu、Aina He、Yaqiang Dong、Yong Wang、Jiawei Li

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CAS Key Laboratory of Magnetic Materials and Devices,and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology,Ningbo Institute of Materials Technology & Engineering,Chinese Academy of Sciences,Ningbo 315201,China

Department of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,China

Shenyang National Laboratory for Materials Science,Northeastern University,Shenyang 110819,China

School of Metallurgy,Northeastern University,Shenyang 110819,China

University of Chinese Academy of Sciences,Beijing 100049,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Liaoning Provincial Department of Science and TechnologyFundamental Research Funds for the Central Universities

5177121551701038519740912021-MS-308N2125009

2024

10.1016/j.jmst.2023.11.014

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.186(19)
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