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Probing the Stability of Superhydrophobic (SHP) Silane Coating on Anodized Ti Substrate Using Kelvin Probe Force Microscope (KPFM)

  • K. IndiraEmail author
  • S. C. Vanithakumari
  • U. Kamachi Mudali
  • C. Mallika
Technical Paper
  • 16 Downloads

Abstract

The present work aims at probing the stability of superhydrophobic (SHP) silane coating on anodized Ti substrate in different environmental conditions using Kelvin probe force microscope (KPFM) technique. The measurements were carried out for anodized silane-coated SHP Ti samples before and after exposure to UV light and flowing water systems. The KPFM mapping results (surface potential measurements) revealed that the SHP silane coating from anodized Ti surface was partially removed after exposure to the UV light and flowing water system. Moreover, reduction in surface roughness and contact angle was observed after exposure resulting in the conversion of the sample surface from SHP to hydrophobic condition indicating the stability of the coating in the aggressive environments. The results clearly showed that the SHP silane-coated Ti is highly suitable for applications in cooling water system.

Keywords

KPFM Surface potential SHP silane coating Contact angle Coating degradation 

Notes

Acknowledgements

First author, Dr. K. Indira gratefully acknowledges the Research Associate fellowship granted by Department of Atomic Energy.

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Copyright information

© The Indian Institute of Metals - IIM 2019

Authors and Affiliations

  • K. Indira
    • 1
    Email author
  • S. C. Vanithakumari
    • 1
  • U. Kamachi Mudali
    • 2
    • 3
  • C. Mallika
    • 1
  1. 1.Corrosion Science and Technology Division (CSTD)Indira Gandhi Center for Atomic ResearchKalpakkamIndia
  2. 2.Heavy Water BoardMumbaiIndia
  3. 3.Homi Bhabha National InstituteKalpakkamIndia

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