Plasma, Graphene Unite to Shield Metals from Corrosion

Graphene, a material renowned for its exceptional properties, is being explored for its anticorrosive capabilities when applied to metal surfaces. Researchers at the Plasma Innovation Laboratory (LIPs) at the University of Córdoba are advancing this field by utilizing plasma technology to enhance graphene production and application. Their recent technological design has increased graphene production by over 22%.

The team is investigating two methods for applying graphene to metal surfaces using microwave plasmas at atmospheric pressure, aiming to maintain the metal's inherent properties. The first method involves direct transfer, where graphene is synthesized and deposited onto a surface exposed to plasma. This technique is noted for its speed. The second method is a three-step process: synthesizing graphene, dispersing it in an organic solvent, and applying it like paint. Although slower, this approach offers versatility and better surface coverage.

These methods have potential applications in protecting fuel cell electrodes from oxidation, which can damage electrodes and membranes. However, a challenge remains in achieving strong adhesion between the graphene layer and metal surfaces. "They didn't adhere well enough, so we need to improve that aspect," said researcher Rocío Rincón.

Despite adhesion challenges, the research provides valuable insights into graphene deposition on metals. The team emphasizes the importance of understanding the material's effects on metal surfaces and refining the methods. "The tests that didn't work taught us a lot about the material and how to deposit it," Rincón added. The next phase of research will focus on enhancing graphene adhesion to metal surfaces.