Contributions to Proceedings:

D. Kumar, K. Kroechert Ching, G. Kalss, G. Liedl:
"Femtosecond laser structuring of nodular cast iron for anticorrosion and thermally stable superhydrophobic surface";
in: "Lasers in Manufacturing Conference", issued by: WLT; WLT - Wissenschaftliche Gesellschaft Lasertechnik e.V., 2021, 6 pages.

English abstract:
The superhydrophobic surface has many applications, such as anti-corrosion, anti-icing, and self-cleaning. In this paper, we describe superhydrophobic surfaces on nodular cast iron produced by femtosecond laser pulses. A rapid transformation of surface characteristics from hydrophilic to superhydrophobic has been achieved after placing the samples in a high vacuum chamber for 10 hours, indicating a significant reduction in the storage time required to develop hydrophobic properties. Thermal stability has been assessed after heating the samples at different temperatures for an hour in a furnace. Consequently, the static contact angle has been measured after cooling at room temperature. Samples irradiated at 0.63 J/cm2 and 3.18 J/cm2 with a hatch distance of 20 m show stable superhydrophobic characteristics up to 180C. Corrosion tests have also been carried out on untreated and laser-treated samples at room condition in a 3.5% NaCl solution. Results indicate that a superhydrophobic surface has better resistance toward corrosion.

Femtosecond laser; Superhydrophobic; LIPSS; Thermal stability; Corrosion

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Project Head Gerhard Liedl:

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