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<p>Electrodeposition (ED) and electrophoretic deposition (EPD) are commonly used techniques to create nickel–zinc (Ni-Zn) coatings that exhibit enhanced mechanical and electrochemical properties. Recent developments in Ni-Zn composite coatings reinforced with carbonaceous allotropes (graphene, carbon nanotubes, graphene oxide, diamond, and fullerenes), as well as ceramic and polymer additives, are compiled in this study. Carbonaceous reinforcements continuously improve hardness (e.g., Ni-Zn–CNT coatings reaching ~ 160 HV vs. ~ 120 HV for pure Ni–Zn) and decrease corrosion rates (I<sub>corr</sub> dropping from ~ 6.5 μA&#xa0;cm<sup>-2</sup>&#xa0;to ~ 2.1 μA&#xa0;cm<sup>-2</sup>, E<sub>corr</sub> shifting favorably by ~ 50 to −&#xa0;100&#xa0;mV) when compared to unreinforced Ni-Zn. The addition of graphene also enhances the elastic modulus by approximately 39% and reduces the corrosion rate from approximately 37.7 to 1.3 mils/year. Hybrid GO-Al<sub>2</sub>O<sub>3</sub>&#xa0;reinforcements increase the charge transfer resistance by up to around 1200 Ω&#xa0;cm<sup>2</sup>. Polymer-based additives, like PTFE, improve coating compactness and further reduce I<sub>corr</sub> (~&#xa0;0.9 μA&#xa0;cm<sup>-2</sup>). These quantitative improvements highlight the synergetic effects of combining carbonaceous nanomaterials with Ni-Zn, enabling multifunctional coatings with superior wear resistance, corrosion protection, and electrochemical stability. These results highlight the promise of Ni-Zn-carbonaceous systems for scaled uses in electronics, energy storage, automotive, marine, and aerospace.</p>

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Carbon-Enabled Ni-Zn Composite Coatings via ED/EPD: A Review

  • 期刊论文

  • 发表日期：

    2025年12月23日

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  • Suman Yadav,
  • Shikha Awasthi

摘要

Electrodeposition (ED) and electrophoretic deposition (EPD) are commonly used techniques to create nickel–zinc (Ni-Zn) coatings that exhibit enhanced mechanical and electrochemical properties. Recent developments in Ni-Zn composite coatings reinforced with carbonaceous allotropes (graphene, carbon nanotubes, graphene oxide, diamond, and fullerenes), as well as ceramic and polymer additives, are compiled in this study. Carbonaceous reinforcements continuously improve hardness (e.g., Ni-Zn–CNT coatings reaching ~ 160 HV vs. ~ 120 HV for pure Ni–Zn) and decrease corrosion rates (Icorr dropping from ~ 6.5 μA cm-2 to ~ 2.1 μA cm-2, Ecorr shifting favorably by ~ 50 to − 100 mV) when compared to unreinforced Ni-Zn. The addition of graphene also enhances the elastic modulus by approximately 39% and reduces the corrosion rate from approximately 37.7 to 1.3 mils/year. Hybrid GO-Al2O3 reinforcements increase the charge transfer resistance by up to around 1200 Ω cm2. Polymer-based additives, like PTFE, improve coating compactness and further reduce Icorr (~ 0.9 μA cm-2). These quantitative improvements highlight the synergetic effects of combining carbonaceous nanomaterials with Ni-Zn, enabling multifunctional coatings with superior wear resistance, corrosion protection, and electrochemical stability. These results highlight the promise of Ni-Zn-carbonaceous systems for scaled uses in electronics, energy storage, automotive, marine, and aerospace.