Synthesis of an eco-inspired anticorrosive composite for mild steel applications: RSC Advances

A. Kawsihan, D.M.S.N. Dissanayake, N.P.W. Rathuwadu, H.C.S. Perera, K.E.D.Y.T. Dayananda, K.R. Koswattage, R. Mahadeva, A. Ganguly, G. Das, M.M.M.G.P.G. Mantilaka

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We synthesised a polyaniline/mica (Mica-PANI) nanocomposite using naturally occurring muscovite mica by a top-down approach. The developed coating materials were characterised using a different technique to investigate their chemical and structural properties using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). Furthermore, the electrochemical properties of the coating materials were investigated by linear sweep voltammetry (LSV). SEM images elucidate the composite's average particle diameter of the prepared nano-mica, approximately 80 nm. The existence of relevant functional groups and bonding in the prepared Mica-PANI composite material was confirmed by means of XPS and FTIR techniques. Moreover, the synthesised composite with 5% w/w shows high anticorrosion protection, i.e. 84 μm per year, compared to competing materials, including commercial paint and individual raw materials (0.35 mm per year). The anti-corrosive effect occurs mainly due to two opposing effects: the formation of an Fe(OH)3 passive layer on the steel surface by oxidation of surface iron atoms by the PANI and the barrier effect of mica NPs through inhibition of corrosive agents. Therefore, the eco-inspired composite could be an ideal cost-effective coating material to prevent the corrosion of mild steel surfaces. © 2023 The Royal Society of Chemistry.
Original languageBritish English
Pages (from-to)28852-28860
Number of pages9
JournalRSC Adv.
Volume13
Issue number41
DOIs
StatePublished - 2023

Keywords

  • Chemical bonds
  • Corrosion prevention
  • Corrosion resistance
  • Corrosion resistant coatings
  • Cost effectiveness
  • Iron compounds
  • Low carbon steel
  • Mica
  • Scanning electron microscopy
  • Steel corrosion
  • X ray photoelectron spectroscopy
  • Anti-corrosive
  • Coating material
  • Linear sweep voltammetry
  • Muscovite mica
  • Naturally occurring
  • Particle diameters
  • Scanning electron microscopy image
  • Synthesised
  • Top down approaches
  • X- ray diffractions
  • Fourier transform infrared spectroscopy

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