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<p>The IPG pulse laser was used to clean the anodic oxide film of 2324 aluminum alloy. In this study, the influence of average power 160-190 W , scanning speed 2000-5000&#xa0;mm/s, and pulse width 40-100&#xa0;ns on the surface morphology, microstructure, and surface quality of the cleaned sample was systematically investigated. Furthermore, the corrosion behavior of laser-cleaned samples and mechanically polished samples under neutral (pH = 7), acidic (pH = 5), and alkaline (pH = 9) solution environments was tested by comparing the optimized process parameters. The results indicate that as the average power increases, the laser energy density increases and the surface roughness significantly decreases. The increase in scanning speed leads to a decrease in the overlap rate of the light spot, and the surface oxygen content shows a trend of first decreasing and then increasing. Although the expansion of pulse width intensifies the heat-affected zone (HAZ), the cleaning effect shows an initial increase followed by a decrease. However, the surface corrosion rate of laser-cleaned samples is lower than that of mechanically polished samples, and their electrochemical impedance value is higher. They also exhibit optimal corrosion resistance in acidic media. Therefore, this work provides a theoretical basis for optimizing the high-precision and low damage cleaning process of aviation aluminum alloys.</p>

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Experimental Study on Laser Cleaning of Anodized Film on 2324 Aluminum Alloy

  • 期刊论文

  • 发表日期：

    2026年4月2日

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  • Wei Wang,
  • Tianhao Yao,
  • Weijun Liu,
  • Hongyou Bian,
  • Xiaoxu Li,
  • Fei Xing

摘要

The IPG pulse laser was used to clean the anodic oxide film of 2324 aluminum alloy. In this study, the influence of average power 160-190 W , scanning speed 2000-5000 mm/s, and pulse width 40-100 ns on the surface morphology, microstructure, and surface quality of the cleaned sample was systematically investigated. Furthermore, the corrosion behavior of laser-cleaned samples and mechanically polished samples under neutral (pH = 7), acidic (pH = 5), and alkaline (pH = 9) solution environments was tested by comparing the optimized process parameters. The results indicate that as the average power increases, the laser energy density increases and the surface roughness significantly decreases. The increase in scanning speed leads to a decrease in the overlap rate of the light spot, and the surface oxygen content shows a trend of first decreasing and then increasing. Although the expansion of pulse width intensifies the heat-affected zone (HAZ), the cleaning effect shows an initial increase followed by a decrease. However, the surface corrosion rate of laser-cleaned samples is lower than that of mechanically polished samples, and their electrochemical impedance value is higher. They also exhibit optimal corrosion resistance in acidic media. Therefore, this work provides a theoretical basis for optimizing the high-precision and low damage cleaning process of aviation aluminum alloys.