The objective of the present study is to develop epoxy-based coating containing graphene nanoplatelets (0.25 (w/w)) coated with niobium at different concentrations (0.1, 0.5, 1, and 2% (w/w)) using magnetron sputtering technique for further use on an aluminum alloy panel (AA7075). Raman spectroscopy, wettability, impact, and corrosion resistance (ACET), electromagnetic shielding, and morphological analysis of the nanocomposites were performed. The hydrophobicity showed an increase of ∼27% for higher niobium concentrations (compared to the neat epoxy). Also, at higher niobium concentrations (1 and 2%), the electromagnetic shielding showed an attenuation peak at −8 dB for the frequency range 8–10 GHz (compared to a resonance peak of −6 dB at 10.2 G Hz for 0.5% Nb). The results showed that the incorporation of graphene nanoplatelets decorated with niobium proportionate an increase of 2 dB as electromagnetic barrier, which can be related to a conducted network formed by niobium on the surface of the coating via absorption mechanism magnetic properties. ACET showed an increase in the properties by higher niobium concentrations (1 and 2%), indicating an improvement in the shielding protection and corrosion resistance of the suggested composites. The other properties did not show any improvement of the properties.
SongSXiongCYinJ, et al.Mechanical performance and radar-absorption capacity of carbon material–reinforced polymethacrylimide foam: preparation, comparison, and design. Compos B Eng2024; 275: 111317.
JiangBQiCYangH, et al.Recent advances of carbon-based electromagnetic wave absorption materials facing the actual situations. Carbon2023; 208: 390–409.
4.
HualiangLCuiJLiB, et al.Insights into civilian electromagnetic absorption materials: challenges and innovative solutions. Adv Funct Mat2024; 35: 2315722.
5.
YangZCheJZhangZ, et al.High-efficiency graphene/epoxy composite coatings with outstanding thermal conductive and anti-corrosion performance. Compos Part A-Appl S2024; 181: 108152.
6.
MengXXieWYangQ, et al.Self-healing anti-corrosive coating using graphene/organic cross-linked shell isophorone diisocyanate microcapsules. React Funct Polym2024; 202: 106000.
7.
KyhlLNielsenSFČaboAG, et al.Graphene as an anti-corrosion coating layer. Faraday Discuss2015; 180: 495–509.
8.
RamírezGRodilSEArzateH, et al.Niobium based coatings for dental implants. Appl Surf Sci2011; 257: 2555–2559.
9.
YeZWangSWangY, et al.Enhanced hot corrosion resistance and thermal radiation property of NbSi2/Nb2O5-SiO2/SiC ceramic coating for niobium alloys thermal protective system. Surf Coat Tech2024; 479: 130485.
10.
KhanMTahirMNAdilSF, et al.Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications. J Mater Chem A2015; 3: 18753–18808.
11.
YoonYTruongPLLeeD, et al.Metal-oxide nanomaterials synthesis and applications in flexible and wearable sensors. ACS Nanosci Au2022; 2: 64–92.
12.
WenNZhangLJiangD, et al.Emerging flexible sensors based on nanomaterials: recent status and applications. J Mater Chem A2020; 8: 25499–25527.
13.
LiuZZhaoMCYinD, et al.Bio-functional niobium-based metallic biomaterials: exploring their physicomechanical properties, biological significance, and implant applications. Acta Biomater2025; 192: 1–27.
14.
LiTKrumeichFOnoLK, et al.Exploring niobium oxide-based materials for fast-charging lithium-ion anodes: insights from structure to property. Mater Sci Eng R Rep2025; 162: 100887.
15.
KhalidMURudokaiteAda SilvaAMH, et al.A comprehensive review of niobium nanoparticles: synthesis, characterization, applications in health sciences, and future challenges. Nanomaterials2025; 15: 106.
16.
de OliveiraRHda SilvaMMde CarvalhoCT, et al.Niobium-decorated multiwalled carbon nanotubes for voltammetric detection of paracetamol. ACS Omega2025; 10: 19410–19421.
17.
VicentiniRBeraldoRAguiarJP, et al.Niobium pentoxide nanoparticles decorated graphene as electrode material in aqueous-based supercapacitors: accurate determination of the working voltage window and the analysis of the distributed capacitance in the time domain. J Energy Storage2021; 44: 103371.
18.
UllahHLaidaniNMicheliV, et al.Decoration of graphite nanoplatelets with Nb2O5 deposited by radio frequency sputtering. Diamond Relat Mater2018; 89: 206–217.
19.
XavierJRSrinivasanS. Multilayer epoxy/GO/silane/Nb2C nanocomposite: a promising coating material for the aerospace applications. J Adhes Sci Technol2024; 38: 44–69.
20.
BrandoltCSde SouzaJJGKunstSR, et al. Noibium and niobium-iron coatings on API 5LX 70 steel applied with HVOF. Mat Res. 2014; 17.
21.
LavorattiAZatteraAJAmicoSC. Mechanical and dynamic-mechanical properties of silane-treated graphite nanoplatelet/epoxy composites. J Appl Polym Sc2018; 135: 46724.
22.
TuinstraFKoenigJL. Raman spectrum of graphite. J Chem Phys2003; 53: 1126–1130.
23.
SpoorEOerkeVRädleM, et al.Raman spectroscopy of disperse systems with varying particle sizes and correction of signal losses. Sensors2024; 24: 3132.
24.
FanSGongYChenS, et al.Interlayer-spacing modification of MoS2 via inserted PANI with fast kinetics for highly reversible aqueous zinc-ion batteries. Micromachines2025; 16: 754.
25.
LawKY. Definitions for hydrophilicity, hydrophobicity, and superhydrophobicity: getting the basics right. J Phys Chem Lett2014; 5: 686–688.
26.
VazirinasabEJafariRMomenG. Application of superhydrophobic coatings as a corrosion barrier: a review. Surf Coat Tech2018; 341: 40–56.
27.
WenLTianYJiangL. Bioinspired super‐wettability from fundamental research to practical applications. Angew Chem Int Ed2015; 54: 3387–3399.
28.
DikiciBLindnerTŞakarE, et al.Enhancing corrosion resistance and radiation shielding of AIAI 304 SS with Nb and Mo-added Al0.3CrFeCoNi-based high-entropy alloy coatings in 3.5 wt% NaCl: the effect of environmental temperature. J Alloys Compd2025; 1020: 179432.
29.
MiaoMFengZTZhaoXY, et al.In-situ synthesis and synergistic anticorrosion performance of the Sr5(PO4)3OH/Zn/AI-LDH composite with an intercalated spherical structure. Ind Eng Chem Res2025; 64: 3340–3353.
30.
JingJYaoBSunW, et al.Ultra-tough, yet rigid and healable supramolecular polymers with variable stiffness for multimodal actuators. Angew Chem2024; 63: e202410693.
31.
QinCJinQZhaoJ, et al.Study on the mechanical characteristics, heat resistance, and corrosion resistance of unsaturated polyester resin composite. Buildings2023; 13: 1700.
32.
ZhangXWangXMengF, et al.Broadband and strong electromagnetic wave absorption of epoxy composites filled with ultralow content of non-covalently modified reduced graphene oxides. Carbon2019; 154: 115–124.
33.
XieSJiZZhuL, et al.Recent progress in electromagnetic wave absorption building materials. J Build Eng2020; 27: 100963.
34.
ZeranskaKFilakKWilczyńskiK, et al.Graphene-based thermoplastic composites as extremely broadband and frequency-dependent EMI absorbers for multifunctional applications. ACS Appl Electronic Mat2022; 4: 4463–4470.
FanSLiXLiM. The effects of damage and self-healing on impedance spectroscopy of strain-hardening cementitious materials. Cem Concr Res2018; 106: 77–90.
37.
MaHSinclairDCDeanJS. A finite element study on the influence of surface cracks on micro-contact impedance spectroscopy measurements. Solid State Ion2023; 393: 116173.
38.
OgunniyiEADowneyARJSockalingamS, et al.In situ monitoring of impact-induced capacity loss in structural batteries with flexible electronics. J Power Sources2025; 659: 238417.
39.
WangLYaoTLiJ, et al.Revealing damage characteristics and short circuit mode of litjium-ion batteries under high-speed steel ball impact. Int J Impact Eng2026; 209: 105565.
40.
XuYLiHShenY, et al.Improvement of adhesion performance between aluminum alloy sheet and epoxy based on anodizing technique. Int J Adhes Adhes2016; 70: 74–80.
41.
BorowskiPMyśliwiecJ. Recent advances in magnetron sputtering: from fundamentals to industrial applications. Coatings2025; 15: 922.
