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<p>Copper is widely utilized in heat exchangers, liquid cooling systems, and other equipment due to its excellent thermal and electrical conductivity. However, copper is susceptible to corrosion in high-humidity and chloride-rich environments, which can significantly reduce the operational lifespan of equipment. Although traditional electrodeposited Ni–P coatings can improve the corrosion resistance of copper, their protective efficacy remains limited. This study synthesized two-dimensional layered V<sub>2</sub>CT<sub>X</sub> nanosheets from V<sub>2</sub>AlC through etching and fabricated Ni–P-V<sub>2</sub>CT<sub>X</sub> composite coatings on copper via composite electrodeposition. The impact of V<sub>2</sub>CT<sub>X</sub> nanosheets on the microstructure, mechanical properties, and corrosion resistance of Ni–P coatings was investigated using various techniques, including scanning electron microscopy (SEM), microhardness testing, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and atomic force microscopy (AFM). The results indicate that the Ni–P-V<sub>2</sub>CT<sub>X</sub> coating exhibits a uniform and dense surface morphology, devoid of noticeable defects. Notably, the Ni–P-5&#xa0;g/L V<sub>2</sub>CT<sub>X</sub> coating achieved a microhardness of 645.5 HV, marking a 49.2% improvement over conventional Ni–P coating. Electrochemical analysis in a 3.5 wt.% NaCl solution revealed that the Ni–P-1&#xa0;g/L V<sub>2</sub>CT<sub>X</sub> coating exhibited the highest corrosion protection efficiency of 88.5%. The Ni–P-V<sub>2</sub>CT<sub>X</sub> composite coatings demonstrated significant improvements in both corrosion resistance and mechanical properties compared to conventional Ni–P coating. This study presents a novel approach for enhancing the surface protection of copper, with significant potential for application in heat exchangers and liquid cooling systems.</p>

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Electrochemical deposition of Ni–P-V2CTX nanocomposite coatings on copper surfaces and their anti-corrosion properties

  • 期刊论文

  • 发表日期：

    2025年5月30日

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  • Pengju Shi,
  • Xianfeng Zhao,
  • Xinxin Shao,
  • Kangpeng Li,
  • Xinpeng Ji,
  • Minghong Sun,
  • Huidan Lu,
  • Yongping Liu

摘要

Copper is widely utilized in heat exchangers, liquid cooling systems, and other equipment due to its excellent thermal and electrical conductivity. However, copper is susceptible to corrosion in high-humidity and chloride-rich environments, which can significantly reduce the operational lifespan of equipment. Although traditional electrodeposited Ni–P coatings can improve the corrosion resistance of copper, their protective efficacy remains limited. This study synthesized two-dimensional layered V2CTX nanosheets from V2AlC through etching and fabricated Ni–P-V2CTX composite coatings on copper via composite electrodeposition. The impact of V2CTX nanosheets on the microstructure, mechanical properties, and corrosion resistance of Ni–P coatings was investigated using various techniques, including scanning electron microscopy (SEM), microhardness testing, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and atomic force microscopy (AFM). The results indicate that the Ni–P-V2CTX coating exhibits a uniform and dense surface morphology, devoid of noticeable defects. Notably, the Ni–P-5 g/L V2CTX coating achieved a microhardness of 645.5 HV, marking a 49.2% improvement over conventional Ni–P coating. Electrochemical analysis in a 3.5 wt.% NaCl solution revealed that the Ni–P-1 g/L V2CTX coating exhibited the highest corrosion protection efficiency of 88.5%. The Ni–P-V2CTX composite coatings demonstrated significant improvements in both corrosion resistance and mechanical properties compared to conventional Ni–P coating. This study presents a novel approach for enhancing the surface protection of copper, with significant potential for application in heat exchangers and liquid cooling systems.