Biphenylene: A Two-Dimensional Graphene-Based Coating with Superior Anti-Corrosion Performance

Area of Science:

• Materials Science
• Surface Chemistry
• Nanotechnology

Background:

• Metal corrosion poses significant risks to engineering safety and infrastructure.
• Protective coatings are crucial for mitigating corrosion.
• Novel two-dimensional (2D) materials offer promising avenues for advanced anti-corrosion solutions.

Purpose of the Study:

• To investigate the anti-corrosion mechanism of biphenylene, a novel 2D graphene-based material.
• To evaluate the potential of biphenylene as a protective coating for metals.

Main Methods:

• First-principles calculations were employed to study the electronic and structural properties of biphenylene.
• Molecular dynamics simulations were used to assess the interaction of biphenylene with oxygen and water.
• The binding energy between biphenylene and an aluminum substrate was calculated.

Main Results:

• Biphenylene exhibits stable oxygen atom adsorption due to its unique carbon ring structures (tetragonal, hexagonal, octagonal).
• Significant charge transfer (+0.477 and +0.420 e) promotes the formation of a compact, oxygen-rich protective layer.
• Moderate wettability prevents water ingress, and strong binding energy (-413.7 and 415.5 eV) ensures coating durability on aluminum substrates.

Conclusions:

• Biphenylene demonstrates a robust anti-corrosion mechanism driven by oxygen adsorption and protective layer formation.
• Its properties suggest suitability for durable anti-corrosion coatings in various metal protection applications.
• This study highlights biphenylene as a promising material for advanced corrosion resistance technologies.