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The electrochemical corrosion behavior of Fe44Cr16Mo16C18B6 amorphous alloy coating in NaOH solutions of different concentrations (mass fractions of 10%, 20%, 30%) was studied using electrochemical polarization curves, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). Electrochemical test results showed that the anodic polarization curve of Fe44Cr16Mo16C18B6 amorphous alloy coating in NaOH solution exhibited a broad passivation region and secondary passivation, which narrowed with increasing NaOH solution concentration. The EIS spectra consisted of high-frequency inductive arcs and low-frequency capacitive arcs, and the corrosion performance of this alloy coating could be effectively explained using the equivalent circuit model R(RL)(Q(R(CW))). SEM observations revealed that the corrosion products on the surface of the Fe44Cr16Mo16C18B6 amorphous alloy coating became thicker and exhibited spalling phenomena with increasing solution concentration.

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Effect of NaOH Solution Concentration on Corrosion Resistance of Fe–Cr–Mo–C–B Amorphous Alloy Coating

  • 章节

  • 发表日期：

    2025年

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  • Q. J. Chen,
  • L. L. Hu,
  • X. L. Zhou,
  • X. Z. Hua

摘要

The electrochemical corrosion behavior of Fe44Cr16Mo16C18B6 amorphous alloy coating in NaOH solutions of different concentrations (mass fractions of 10%, 20%, 30%) was studied using electrochemical polarization curves, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). Electrochemical test results showed that the anodic polarization curve of Fe44Cr16Mo16C18B6 amorphous alloy coating in NaOH solution exhibited a broad passivation region and secondary passivation, which narrowed with increasing NaOH solution concentration. The EIS spectra consisted of high-frequency inductive arcs and low-frequency capacitive arcs, and the corrosion performance of this alloy coating could be effectively explained using the equivalent circuit model R(RL)(Q(R(CW))). SEM observations revealed that the corrosion products on the surface of the Fe44Cr16Mo16C18B6 amorphous alloy coating became thicker and exhibited spalling phenomena with increasing solution concentration.