2nd Global Congress on Materials Science and Nanotechnology

Presenter: Sachin Sharma Ashok Kumar
Affiliation: Lincoln University College
Presentation Type: Oral Presentation (Virtual)
Title : Effects of TiO2 nanoparticles on the adhesion and anticorrosion properties of the graphene-based composite coating on mild steel using electrochemical impedance spectroscopy approach

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🔬 Understanding the Research Focus

Corrosion is one of the major challenges affecting the durability and performance of metallic materials in engineering applications. This research focuses on improving the anticorrosion performance of mild steel by developing graphene-based nanocomposite coatings enhanced with TiO₂ nanoparticles. By incorporating graphene and titanium dioxide nanoparticles into a polymer matrix, the study aims to create protective coatings that enhance adhesion, increase hydrophobicity, and provide long-term corrosion resistance for steel surfaces.

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📊 Quantitative Modeling Approach

To analyze the performance of the developed coatings, several experimental and analytical techniques were used. These include water contact angle (WCA) measurements to determine surface hydrophobicity, cross-hatch tests (CHT) to evaluate coating adhesion, field emission scanning electron microscopy (FESEM) to observe surface morphology, and electrochemical impedance spectroscopy (EIS) to monitor corrosion resistance. The EIS results were recorded over a 30-day immersion period, enabling researchers to evaluate the long-term stability and protective behavior of the coatings.

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🧪 Nanocomposite Coating Development

The study introduced TiO₂ nanoparticles in concentrations ranging from 0.5 wt.% to 3 wt.% into an acrylic-epoxy polymer matrix reinforced with graphene. The results showed that TiO₂ nanoparticles successfully bonded with graphene surfaces, improving the dispersion of the nanoparticles within the polymer matrix. As the TiO₂ concentration increased, the hydrophobicity of the coating also improved, reaching a maximum water contact angle of 120.85° at 3 wt.% TiO₂. The graphene/TiO₂ (1:1) composite system demonstrated the best dispersion and corrosion resistance performance.

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🎯 Key Takeaway Strategy

The findings demonstrate that combining graphene with TiO₂ nanoparticles can significantly enhance the protective properties of polymer coatings on mild steel. The graphene/TiO₂ nanocomposite system exhibited excellent impedance modulus values exceeding 10¹⁰ Ω cm², indicating strong resistance to corrosion. This approach shows great potential for industrial applications where durable and long-lasting anticorrosion coatings are essential.

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👨‍🔬 About the Author

Sachin Sharma Ashok Kumar is an Associate Professor at Lincoln University College specializing in advanced materials and graphene-based nanocomposites. His research focuses on graphene materials for applications such as corrosion protection coatings, supercapacitors, batteries, solar cells, fuel cells, hydrogen storage, and polymer nanocomposites. He completed his BSc and MSc in Mechanical Engineering with a minor in Materials Science from Wichita State University and earned his PhD in Advanced Materials Science Engineering from University of Malaya. He has published more than 60 research articles and presented his work at over 70 international conferences.

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2nd Edition of International Congress on Materials Science and Nanotechnology

📅 November 23–25, 2026
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