• Kumar, Prakash
• Ramesh, M. R.
• Doddamani, Mrityunjay

Abstract

<jats:p>&lt;div&gt;The present work highlights the significance of nanocomposite coatings for theirease of processing and applicability in combating corrosion. Ongoing research isdedicated to the development of an effective nanocomposite hydrophobic coating.A hydrophobic nanocomposite coating was deposited on galvanized iron (GI) usinga sol-gel route with polymethylsiloxane (PDMS) reinforced withnano-SiO&lt;sub&gt;2&lt;/sub&gt;. Surface morphology and chemical composition analysis,conducted with scanning electron microscopy (SEM) with energy dispersivespectroscopy (EDAX) and Fourier transform infrared spectroscopy (FTIR), revealedthe coating’s structural and compositional attributes. The resulting hydrophobiccoating exhibits a water contact angle (WCA) of 104.1°, indicating a 30.45%increase compared to bare GI. Subsequent to these characterizations, theadhesion of the coated GI, rated as 4B per ASTM D3359, is followed bycommendable resistance to corrosion, as evidenced by electrochemical tests. Thecorrosion rate for the coated GI sheet is notably low, at 62.78 ×10&lt;sup&gt;−3&lt;/sup&gt; mpy, underscoring its anti-corrosive efficacy.&lt;/div&gt;</jats:p>

Topics

• nanocomposite
• impedance spectroscopy
• morphology
• surface
• corrosion
• scanning electron microscopy
• chemical composition
• Silicon
• iron
• Energy-dispersive X-ray spectroscopy
• Fourier transform infrared spectroscopy