The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Modified stainless steel surfaces targeted to reduce fouling - surface characterization

På svenska

Author

  • Olga Santos
  • Tommy Nylander
  • R Rosmaninho
  • G Rizzo
  • S Yiantsios
  • N Andritsos
  • A Karabelas
  • H Muller-Steinhagen
  • L Melo
  • L Boulange- Petermann
  • C Gabet
  • Alan Braem
  • Christian Trägårdh
  • Marie Paulsson
Show all

Summary, in English

The surface properties of several modified stainless steel samples were characterized according to their chemical composition, roughness, topography and wettability. The modifications tested were SiF3+ and MoS22+ ion implantation; diamond-like carbon (DLC) sputtering: DLC. DLC-Si-O and SiOx, plasma enhanced chemical vapor deposition (PECVD); autocatalytic Ni-P-PTFE and silica coating. X-ray photoelectron spectroscopy (XPS) and X-ray microanalysis were applied to determine the surface chemical composition. Atomic force microscopy (AFM) and stylus-type instruments were used for roughness determination, and the surface topography was imaged with AFM and scanning electron microscopy (SEM). The contact angle and surface tension were measured with the Wilhelmy plate method and the sessile drop method. For thick modified layers, only the elements of the coating were detected at the surface, whereas for thin layers the surface composition determined was that of the stainless steel substrate. The roughness of the 2R (cold rolled and annealed in a protective atmosphere) Surfaces was not altered by the modification techniques (except for the Ni-P-PTFE coating), while for the 2B (cold rolled. heat treated, pickled and skinpassed) surfaces an increase in roughness was observed. The silica coating produced surfaces with consistent roughness, independent of which steel substrate was used. DLC sputtering and Ni-P-PTFE coating produced surfaces with the highest roughness. All modified surfaces revealed a similar surface topography with the exception of the Ni-P-PTFE coating, for which the coating masked the underlying steel topography. In terms of wettability, the SiOx-plasmaCVD and NiP-PTFE coating, techniques produced the most hydrophilic and hydrophobic surfaces, respectively. (C) 2003 Elsevier Ltd. All rights reserved.

Department/s

Publishing year

2004

Language

English

Pages

63-79

Publication/Series

Journal of Food Engineering

Volume

64

Issue

1

Document type

Journal article

Publisher

Elsevier

Topic

  • Physical Chemistry
  • Food Engineering

Keywords

  • Surface energy
  • Roughness
  • Fouling
  • Chemical composition
  • Modified stainless steel

Status

Published

ISBN/ISSN/Other

  • ISSN: 0260-8774