Durability and wear resistance of laser-textured hardened stainless steel surfaces with hydrophobic properties

Antonio Garcia Giron, Jean-Michel Romano, Behnam Dashtbozorg, Hanshan Dong, Elena Martinez-Solanas, David Urrutia Angos, Marc Walker, Pavel Penchev, Stefan Dimov

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13 Citations (Scopus)
215 Downloads (Pure)

Abstract

Hydrophobic surfaces are of high interest to industry. While surface functionalization has attracted a significant interest, both from industry and research, the durability of engineered surfaces remains a challenge, as wear and scratches deteriorate their functional response. In this work, a cost-effective combination of surface engineering processes on stainless steel was investigated. Low temperature plasma surface alloying was applied to increase surface hardness from 172 to 305 HV. Then, near-infrared nanosecond laser patterning was deployed to fabricate channel-like patterns that enabled superhydrophobicity. Abrasion tests were carried out to examine the durability of such engineered surfaces during daily use. In particular, the evolution of surface topographies, chemical composition and water contact angle with increasing abrasion cycles were studied. Hydrophobicity deteriorated progressively on both hardened and raw stainless steel samples, suggesting that the major contributing factor to hydrophobicity was the surface chemical composition. At the same time, the samples with increased surface hardness exhibited a slower deterioration of their topographies when compared with non-treated surfaces. A conclusion is made about the durability of laser-textured hardened stainless steel surfaces produced by applying the proposed combined surface engineering approach.
Original languageEnglish
JournalLangmuir
DOIs
Publication statusPublished - 1 Apr 2019

Keywords

  • surface engineering
  • Laser patterning
  • nanosecond laser
  • Hydrophobicity
  • plasma surface alloying
  • wear resistance

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