Influence of functionalized multi-layer graphene on adhesion improvement and corrosion resistance performance of zinc-rich epoxy primer

ABSTRACT

The influence of functionalised multi-layer graphene (FMLG) on anti-corrosion behaviour of zinc-rich primer (ZRP) was investigated. Electrochemical impedance spectroscopy, salt spray, cathodic delamination, pull-off adhesion tests and scanning electron microscopy analysis were evaluated. Samples were prepared using 0.25, 0.5, 0.75 and 1 wt-% of FMLG substituted by the same amount of zinc particles in epoxy containing 75 wt-% of zinc dust. Results revealed that sacrificial and barrier performances of ZRP were improved in the presence of FMLG. In addition, the adhesion and cathodic disbondment resistance showed significant improvement. The best results were obtained for ZRP containing 0.75 wt-% of FMLG.

KEYWORDS:

• Functionalised multi-layer graphene
• zinc-rich primer
• electrical conductivity
• adhesion
• cathodic disbondment

Acknowledgements

The authors also gratefully acknowledge of Pedram Paint Company.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The authors would like to acknowledge University of Guilan and Iran Nanotechnology Initiative Council for the financial support during this research.