Open AccessFabrication of the stainless steel surface with super durable one‐direction superhydrophobicity and two‐direction anisotropic wettability
Author(s) -
Wan Yanling,
Lian Zhongxu,
Xu Jinkai,
Weng Zhankun,
Yin Xiaoming,
Yu Huadong
Publication year - 2014
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2014.0275
Subject(s) - wetting , fabrication , materials science , anisotropy , contact angle , composite material , surface (topology) , nanotechnology , optics , geometry , physics , medicine , alternative medicine , mathematics , pathology
Inspired by the anisotropy of the rice leaf surface, high‐speed wire electrical discharge machining (HS‐WEDM) technology was used to build submillimetre‐scale structures on the 304 stainless steel surfaces, and fluorination treatment was applied on the resulting surfaces. The wettability and microstructure of the resulting surfaces were investigated by a large depth 3D scanner, scanning electron microscopy and by the contact angle measuring instrument. The durability of the fabricated surface was evaluated by wear tests. Results show that the V‐shaped groove arrays with a hierarchical structure on the processed surfaces are built by HS‐WEDM. After the fluorination treatment, the as‐machined surfaces show good one‐direction superhydrophobicity and the obvious two‐direction (the parallel and perpendicular groove directions) anisotropic wettability. The effect of the size of the V‐shaped groove on the two‐direction anisotropy is discussed. The wear tests show that the one‐direction superhydrophobicity and the two‐direction anisotropic sliding properties of the stainless steel surfaces are still exhibited after the tests. Fabricating rough surfaces by HS‐WEDM is efficient and does not require complex process operation and large area three‐dimensional features. This method can realise industrial production.