Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Coating Performance of SiO2 / Epoxy Composites as a Corrosion Protector

  • Rzaij, Dina R. (Electrical Engineering Technical College, Middle Technical University) ;
  • Ahmed, Nagham Y. (Electrical Engineering Technical College, Middle Technical University) ;
  • Alhaboubi, Naseer (Department of Chemical Engineering, Al-Nahrain University)
  • Received : 2021.12.23
  • Accepted : 2022.01.18
  • Published : 2022.05.06
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Abstract

To solve the corrosion problem of industrial equipment and other constructions containing metals, corrosion protection can be performed by using coating which provides a barrier between the metal and its environment. Coatings play a significant role in protecting irons and steels in harsh marine and acid environments. This study was conducted to identify an anti-corrosive epoxy coating for carbon steel composite with 0.1, 0.3, and 0.5 wt% concentrations of nanoparticles of SiO2 using the dip-coating method. The electrochemical behavior was analyzed with open circuit potential (OCP) technics and polarization curves (Tafle) in 3.5 wt% NaCl and 5 vol% H2SO4 media. The structure, composition, and morphology were characterized using different analytical techniques such as X-ray Diffraction (XRD), Fourier Transform Infrared spectrum (FT-IR), and Scanning Electron Microscopy (SEM). Results revealed that epoxynano SiO2 coating demonstrated a lower corrosion rate of 2.51 × 10-4 mm/year and the efficiency of corrosion protection was as high as 99.77%. The electrochemical measurement showed that the nano-SiO2 / epoxy coating enhanced the anti-corrosive performance in both NaCl and H2SO4 media.

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References

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