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<p>The influence of aluminum contents on the cavitation corrosion resistance of CoCrFeNiAl<sub>x</sub> high-entropy alloy (HEA) coatings deposited on TC4 via laser cladding was investigated in both distilled water and artificially simulated seawater. The results showed that the cavitation corrosion resistance of the coatings increased and then decreased with increasing Al content in both media. The weight loss rate was significantly higher in simulated seawater than in distilled water. Increasing the Al content led to a transition in the coating phase from a single FCC phase to FCC + BCC dual phases, which improved the corrosion resistance. However, as the BCC phase content increased, the plasticity of the coating decreased while the strength increased, reducing the coating’s ability to absorb cavitation energy and leading to severe cavitation damage.</p>

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Anti-cavitation corrosion of laser-cladded CoCrFeNiAlx on TC4 surface

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月23日

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  • Pei-Hu Gao,
  • Jie Liu,
  • Bai-Yang Chen,
  • Rui-Guang Xie,
  • Anton Naumov,
  • Josephine Joseph Soka,
  • Qi-Bao Li

摘要

The influence of aluminum contents on the cavitation corrosion resistance of CoCrFeNiAlx high-entropy alloy (HEA) coatings deposited on TC4 via laser cladding was investigated in both distilled water and artificially simulated seawater. The results showed that the cavitation corrosion resistance of the coatings increased and then decreased with increasing Al content in both media. The weight loss rate was significantly higher in simulated seawater than in distilled water. Increasing the Al content led to a transition in the coating phase from a single FCC phase to FCC + BCC dual phases, which improved the corrosion resistance. However, as the BCC phase content increased, the plasticity of the coating decreased while the strength increased, reducing the coating’s ability to absorb cavitation energy and leading to severe cavitation damage.