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Role of micrometric roughness on anti-ice properties and durability of hierarchical super-hydrophobic aluminum surfaces.
- Source :
-
Surface & Coatings Technology . Sep2019, Vol. 374, p549-556. 8p. - Publication Year :
- 2019
-
Abstract
- Ice accretion and accumulation may cause a severe problem in many disparate fields from aircraft to electrical transmission lines. Super-hydrophobic (SHP) surfaces can have a potential anti-icing application due to their extreme water repellency. However, there is a lack in the characterization of icing behavior of these surfaces. Moreover, durability is a major concern for this kind of coatings. One class of super-hydrophobic surfaces is constituted by hierarchical structures, in which a micrometric roughness is combined with a nanometric roughness and finally covered by a low energy chemical finishing. In the present work, we experimentally investigated how the micrometric roughness of the aluminum alloy surface can influence the hierarchical micro-nanostructure and the consequent hydrophobic and anti-icing properties, especially in terms of durability. Aluminum alloy samples were sandblasted or polished to generate a different micrometric roughness. The following steps to obtain a hierarchical super-hydrophobic structure (nano-roughness and final low energy chemical treatment) were kept constant for all samples. The hydrophobic properties were characterized at room and low temperatures and the anti-icing behavior was measured by shear stress tests. Several repetitions of the shear stress measurement on the same samples and icing- thaw cycles were conducted to study the durability of the coatings. This work describes an easy, fast and economic process to obtain super-hydrophobic materials with durable anti-icing properties, with interesting applications in many industrial fields. • Icephobic aluminum is obtained by roughening, boiling and coating the surfaces. • Different roughness treatments cause different hydrophobic and icephobic properties. • Hydrophobicity at low temperature gives clues of the icephobicity of the samples. • The sandblasted samples have a promisingly durable icephobicity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02578972
- Volume :
- 374
- Database :
- Academic Search Index
- Journal :
- Surface & Coatings Technology
- Publication Type :
- Academic Journal
- Accession number :
- 138369271
- Full Text :
- https://doi.org/10.1016/j.surfcoat.2019.06.001