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

    Research output: Contribution to journalArticlepeer-review

    17 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Article number63709
    Pages (from-to)1144-1150
    Number of pages7
    JournalTransactions of Nonferrous Metals Society of China (English Edition)
    Volume25
    Issue number4
    DOIs
    Publication statusPublished - 2015 Apr 1

    Keywords

    • Fe-based amorphous/nanocrystalline
    • HVOF spraying
    • coating
    • corrosion resistance

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Geotechnical Engineering and Engineering Geology
    • Metals and Alloys
    • Materials Chemistry

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