Our Article in New J. Chemistry about a superhydrophobic coating for protecting steel
Link to the article:
In this work, the objective is to study the differences in the hydrophobicity and anticorrosion property of stearic acid-modified Zn coatings with different structures. Therefore, we adopt an electrodeposition method for the preparation of Zn coatings with nano-, micro-, nano/micro-, and micro/nanostructures, and assemble a stearic acid thin layer onto the surfaces of Zn coatings to obtain STA-modified Zn coatings. The main research highlights are as follows:(i) The surface morphology of Zn coating was controlled by dynamically adjusting the current density;(ii) the modified micro/nanostructured Zn coating had a large range rough surface with a CA of 158.7° and a SA of 6.4°; (iii) the superhydrophobicity of the modified micro/nanostructured Zn coating relies on both morphological and chemical property of the surface; (iv) the superhydrophobic Zn coating with micro/nanostructure has excellent corrosion resistance for carbon steel substrate when immersed in 3.5% NaCl solution. Thus, the superhydrophobic STA-Zn coatings are expected to have huge amount of practical applications in controlling the wettability of surfaces and corrosion resistance of metallic materials.
Optical photographs of water drops on the surface of (a) STA-modified steel, (b) STA-modified Zn-1, (c) STA-modified Zn-2, (d) STA-modified Zn-3 and (e) STA-modified Zn-4 coatings after knife scratching test.
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