The relentless attack of corrosion on metallic surfaces is a pervasive issue that compromises the structural integrity and operational efficiency of materials in numerous industrial applications. This research aims to enhance the corrosion resistance of metallic surfaces through the application of hydrophobic hexagonal boron nitride (h-BN) nanosheets. The primary objectives of this research are to synthesize hydrophobic h-BN nanosheets (BNNS) and to evaluate the efficacy in providing corrosion protection to a variety of metallic substrates. By utilizing a mechanical exfoliation technique, the BNNS were derived from bulk h-BN, followed by a surface modification process to confer hydrophobicity. The synthesized BNNS underwent comprehensive characterization using an array of analytical tools, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM) for morphological characterization, alongside X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and energy-dispersive X-ray spectroscopy (EDS) for phase analysis, to comprehensively assess the attributes of hydrophobic BNNS in enhancing the corrosion resistance of metallic surfaces. The corrosion resistance of metallic substrates, such as mild steel, aluminum alloys, and titanium alloys, was assessed by applying the BNNS-based coatings and subjecting them to a series of electrochemical tests, including potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and salt spray testing. The key findings of this research demonstrate a marked improvement in the corrosion resistance of metallic surfaces post-coating with hydrophobic BNNS. The XRD analysis confirmed the successful exfoliation of h-BN and the enhancement of the (020) crystal face peak, indicative of the exposure of vertical lattice planes due to the introduction of structural defects. The hydrophobic nature of the BNNS was quantified through contact angle measurements, which exhibited a significant increase in hydrophobicity post-coating. Electrochemical tests revealed a positive shift in the corrosion potential and a reduction in the corrosion current density, signifying a diminished corrosion rate. The implications of this research are far-reaching, as the hydrophobic BNNS present a novel and effective strategy for mitigating corrosion on metallic surfaces. By reducing the interaction between water and metal, the BNNS coatings act as a physical barrier, thereby hindering the electrochemical processes that precipitate corrosion. This study offers valuable insights into the development of advanced nanomaterial-based coatings for corrosion protection, with potential applications across various sectors, including aerospace, automotive, and civil infrastructure. In summary, the employment of hydrophobic BNNS as a corrosion-resistant coating for metallic surfaces represents a significant stride in material protection technology. The findings of this research not only advance the understanding of nanomaterial applications in corrosion mitigation but also pave the way for the development of more durable and cost-effective solutions to extend the service life and reliability of metallic components in a wide range of environments.

Corrosion Resistance,Hexagonal Boron Nitride,Nanosheets,Hydrophobicity,Surface Modification