期刊
APPLIED SURFACE SCIENCE
卷 439, 期 -, 页码 598-604出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2017.12.211
关键词
Stainless steel; Superhydrophobicity; HF etching; NaCl dipping; Durability; Self-cleaning
类别
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Republic of Korea [2016R1D1A1B 03935228]
- National Research Foundation of Korea [2016R1D1A1B03935228] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Stainless steels are among the most common engineering materials and are used extensively in humid areas. Therefore, it is important that these materials must be robust to humidity and corrosion. This paper reports the fabrication of superhydrophobic surfaces from austenitic stainless steel (type AISI 304) using a facile two-step chemical etching method. In the first step, the stainless steel plates were etched in a HF solution, followed by a fluorination process, where they showed a water contact angle (WCA) of 166 degrees and a sliding angle of 5 degrees under the optimal conditions. To further enhance the superhydrophobicity, in the second step, they were dipped in a 0.1 wt.% NaCl solution at 100 degrees C, where the WCA was increased to 168 degrees and the sliding angle was decreased to similar to 2 degrees. The long-term durability of the fabricated superhydrophobic samples for 1 month storage in air and water was investigated. The potential applicability of the fabricated samples was demonstrated by the excellent superhydrophobicity after 1 month. In addition, the self-cleaning properties of the fabricated superhydrophobic surface were also demonstrated. This paper outlines a facile, low-cost and scalable chemical etching method that can be adopted easily for large-scale purposes. (C) 2017 Elsevier B.V. All rights reserved.
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