Long-term corrosion behavior of HVOF sprayed FeCrSiBMn amorphous/nanocrystalline coating

Yu Jiao Qin, Yu Ping Wu, Jian Feng Zhang, Wen Min Guo, Sheng Hong, Li Yan Chen

    研究成果: Article査読

    21 被引用数 (Scopus)

    抄録

    Abstract A FeCrSiBMn amorphous/nanocrystalline coating with 700 μm in thickness and 0.65% in porosity, was prepared by high velocity oxygen fuel (HVOF) spraying process. The long-term corrosion behavior of the FeCrSiBMn coating was evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests in a 3.5% NaCl solution with a hard chromium coating as a reference. The FeCrSiBMn coating exhibited higher corrosion potential and lower corrosion current density than the hard chromium coating. The pore resistance (Rp) and charge transfer resistance (Rct) of FeCrSiBMn coating were higher than those of the hard chromium coating. In addition, after immersion in the NaCl solution for 28 d, only small pores in the FeCrSiBMn coating were observed. All the results indicated that the FeCrSiBMn coating held superior corrosion resistance to the hard chromium coating. This could be attributed to the dense structure, low porosity and amorphous/nanocrystalline phases of the FeCrSiBMn coating.

    本文言語English
    論文番号63709
    ページ(範囲)1144-1150
    ページ数7
    ジャーナルTransactions of Nonferrous Metals Society of China (English Edition)
    25
    4
    DOI
    出版ステータスPublished - 2015 4 1

    ASJC Scopus subject areas

    • 凝縮系物理学
    • 地盤工学および土木地質学
    • 金属および合金
    • 材料化学

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