Preparation of super-hydrophobic surface: Study on the Effects of Sandblasting stainless steel

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Original Title:
Preparation of super-hydrophobic surface: Study on the Effects of Sandblasting stainless steel
Languages of Item:
Nanou, Paraskevi
Pandis, Pavlos K.
Zarkadoulas, Athanasios
Konstantaras, John
Tsilikas, Ioannis
Katis, Ilias
Almpani, Despoina
Stathopoulos, Vassilis
Laboratory of Chemistry and Materials Technology, Department of Agricultural Development, Agrofood and Management of Natural Resources, National and Kapodistrian University of Athens, Psachna Campus, Evia, Greece
NCSR “Demokritos”, Institute of Nanoscience and Nanotechnology, Attiki, Greece
Physics Department, National Technical University of Athens, Zografou Campus,
Athens, Greece
Cos Hellas Ltd, Mechanical Workshop, Athens, Greece
Due to the vast range of applications, there has been a lot of study into creating surfaces with
hydrophobic and self-cleaning properties. Such surfaces lessen the need for cleaning and
maintenance by promoting the dropwise condensation effect. Controlling the surface shape
and energy is essential for producing super-hydrophobicity. Surface energy relates to the
chemical interactions between the surface and the surroundings, whereas surface
morphology refers to surface roughness and microstructure. The main goal of this work was
to develop super-hydrophobic surface morphology on sandblasted stainless steel 304 samples.
At first, the effect of the sandblasting procedure was estimated by using four different Al2O3
as blasting medium with a range of particle size from 53-425 μm. Smaller particle sizes of the
blasting media led to increased roll-off angles. Furthermore, the sandblasted specimens were
coated by CVD with trichloro(1H,1H,2H,2H-perfluorooctyl) silane, leading to super
hydrophobicity in all specimens. Finally, water condensation experiments showed that low
range particle size blasting media with CVD coatings enhanced dropwise condensation. The
findings of this study may open the door to creating extremely effective self-cleaning surfaces
in various industries [1-5]
Main subject category:
Chemical Engineering and Materials Science
stainless steel
self-cleaning surfaces
superhydrophobic surface
Pages (from-to):
Includes bibliographical references:
1. P.K. Pandis, S. Papaioannou, V. Siaperas, A. Terzopoulos, V.N. Stathopoulos, Evaluation of Zn- and Fe- rich organic coatings for corrosion protection and condensation performance on waste heat recovery surfaces, International Journal of Thermofluids (2020) 3-4, 100025.
2. P. Nanou, J. Konstantaras, A. Zarkadoulas, P. K. Pandis, N. Vourdas, V. Stathopoulos, Construction, evaluation and performance of a water condensation test unit, in: 8th International Conference on Material Science & Smart Materials (MSSM 2022) (2022), London, England.
3. P. Nanou, A. Zarkadoulas, P.K. Pandis, I. Tsilikas, I. Katis, D. Almpani, N. Orfanoudakis, N. Vourdas, V. Stathopoulos, Micromachining on stainless steel 304 for improved water condensation properties, in: 8th International Conference on Material Science & Smart Materials (MSSM 2022) (2022),London,
4. I. Iliopoulos, A. Karampekios, P.K. Pandis, N. Vourdas, H. Jouhara, S. Tassou, V.N. Stathopoulos, Evaluation of organic coatings for corrosion protection of condensing economizers, Procedia Structural Integrity, 10 (2018) 295-302.
5. N. Vourdas, H. Jouhara, S.A. Tassou, V.N. Stathopoulos, Design criteria for coatings in next generation condensing economizers, Energy Procedia, 161 (2019) 412-420.
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