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<p>In this paper, nano-gadolinium oxide (Gd<sub>2</sub>O<sub>3</sub>) was used as an additive to prepare a ternary Ni-W-P electroless plating composite coating on the surface of the micro-arc oxidation film layer of an aluminum alloy. The surface morphology, composition, phase composition, deposition rate, porosity, bonding strength, hardness, and corrosion resistance in simulated seawater of the composite coating were analyzed. The results show that the Ni-W-P/Gd<sub>2</sub>O<sub>3</sub> composite coating was successfully prepared. Gd<sub>2</sub>O<sub>3</sub> can refine the grains of the coating and promote the thickening of the coating. When the concentration of Gd<sub>2</sub>O<sub>3</sub> is 1.5&#xa0;g/L, the deposition rate and hardness of the coating reach the maximum values, the porosity is the lowest, and the corrosion resistance is the best. Comprehensive analysis of various properties shows that the composite coating with a Gd<sub>2</sub>O3 concentration of 1.5&#xa0;g/L has the best comprehensive performance.</p>

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Effects of Nanoscale Gadolinium Oxide Doping on the Properties of Composite Coatings

  • 期刊论文

  • 发表日期：

    2026年3月19日

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  • Defen Zhang,
  • Yukun Wang,
  • Hong Liu,
  • Yang Lv,
  • Fei Wu,
  • Hua Deng,
  • Xiaowen Chen

摘要

In this paper, nano-gadolinium oxide (Gd2O3) was used as an additive to prepare a ternary Ni-W-P electroless plating composite coating on the surface of the micro-arc oxidation film layer of an aluminum alloy. The surface morphology, composition, phase composition, deposition rate, porosity, bonding strength, hardness, and corrosion resistance in simulated seawater of the composite coating were analyzed. The results show that the Ni-W-P/Gd2O3 composite coating was successfully prepared. Gd2O3 can refine the grains of the coating and promote the thickening of the coating. When the concentration of Gd2O3 is 1.5 g/L, the deposition rate and hardness of the coating reach the maximum values, the porosity is the lowest, and the corrosion resistance is the best. Comprehensive analysis of various properties shows that the composite coating with a Gd2O3 concentration of 1.5 g/L has the best comprehensive performance.