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<p>Anodic oxidation is a widely employed surface strengthening technique for enhancing the comprehensive properties of aluminum alloys (AAs), including their wear resistance and corrosion resistance. However, its application in mitigating cavitation erosion remains underexplored. In this work, the addition of hard particles (SiC, WC and BN) into the electrolyte on the anodic oxide film formed on AA6061 was systematically investigated through orthogonal experiments, cavitation erosion tests, potentiodynamic polarization, electrochemical impedance spectroscopy, and scanning electron microscopy. The results demonstrated that incorporating 6&#xa0;g/L silicon carbide (SiC) particles (average diameter: 500&#xa0;nm) into the electrolyte facilitated the formation of a high-performance composite oxide film. This modification significantly enhanced both cavitation erosion resistance and corrosion resistance. Compared with anodized samples without hard particles, the composite film coupled with subsequent sealing processes reduced the weight loss of AA6061 by 76.6% after cavitation erosion in a 3.5 wt% NaCl solution. This underscores the efficacy of the optimized treatment for AA6061 when deployed in harsh marine environments.</p>

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Improving the cavitation erosion resistance of 6061 aluminum alloy via an anodized film composed of hard particles

  • 期刊论文

  • 发表日期：

    2025年10月28日

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  • Zhe Liu,
  • Mengyang Hou,
  • Chengcheng Pan,
  • Mingyang Wang,
  • Weimin Qin,
  • Da-Hai Xia,
  • Wenbin Hu

摘要

Anodic oxidation is a widely employed surface strengthening technique for enhancing the comprehensive properties of aluminum alloys (AAs), including their wear resistance and corrosion resistance. However, its application in mitigating cavitation erosion remains underexplored. In this work, the addition of hard particles (SiC, WC and BN) into the electrolyte on the anodic oxide film formed on AA6061 was systematically investigated through orthogonal experiments, cavitation erosion tests, potentiodynamic polarization, electrochemical impedance spectroscopy, and scanning electron microscopy. The results demonstrated that incorporating 6 g/L silicon carbide (SiC) particles (average diameter: 500 nm) into the electrolyte facilitated the formation of a high-performance composite oxide film. This modification significantly enhanced both cavitation erosion resistance and corrosion resistance. Compared with anodized samples without hard particles, the composite film coupled with subsequent sealing processes reduced the weight loss of AA6061 by 76.6% after cavitation erosion in a 3.5 wt% NaCl solution. This underscores the efficacy of the optimized treatment for AA6061 when deployed in harsh marine environments.