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Influence of Laser-Machined Micro-geometrical Features on the Surface Wettability of Stainless Steel 304

  • Chilaparapu Venkata Vamsi
  • Vimal Thomas
  • M. Govindaraju
Conference paper
  • 43 Downloads
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

Recently, hydrophobic and superhydrophobic natural surfaces have attained great attention due to their diverse properties. It was found that micro-geometrical features on these natural surfaces have a great influence on generating hydrophobicity. Butterfly and Cicada wings are commonly studied natural hydrophobic surfaces for bio-mimicking and their microstructures are simplified into micro-grooves and micro-pillars, respectively. In the present study, a nanosecond fiber laser is used to produce these micro-geometries on stainless steel AISI 304 surface and its effect on surface wettability is investigated. Experimental results show that fabricated micro-geometries have a wetting transition from hydrophilic to the hydrophobic state over time. In this study, a good hydrophobic surface with a large apparent contact angle of 120° is obtained with 150, 200 µm step size micro-groove geometry on day-29 and micro-pillar geometry with 200 µm step size attained the highest contact angle of 118° on day-4. The contact angle of the non-textured parent material surface is 75°.

Keywords

Hydrophobicity Stainless steel AISI 304 Nanosecond laser Micro-geometries Contact angle 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • Chilaparapu Venkata Vamsi
    • 1
  • Vimal Thomas
    • 2
  • M. Govindaraju
    • 1
  1. 1.Department of Mechanical Engineering, Amrita School of EngineeringAmrita Vishwa VidyapeethamCoimbatoreIndia
  2. 2.Vikram Sarabhai Space Centre (VSSC), ISROThiruvananthapuramIndia

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