Large-Area Fabrication of Superhydrophobic Zinc Surface with Reversible Wettability Switching and Anticorrosion

Abstract

A simple and time-saving method of electrodeposition was found to fabricate the superhydrophobic Zinc surface on the steel substrate. The surface morphologies and chemical compositions were characterized by using scanning electron microscope, Fourier transform infrared spectrometry and X-ray photoelectron spectroscopy. The results show that the as-prepared surfaces form micro/nano rough structures evolved from the as-prepared surfaces which have been modified by stearic acid, and exhibit good superhydrophobicity with a water contact angle of 157.2° as well as a sliding angle of 5.2°. Interestingly, the superhydrophobic Zinc surface can realize an effective reversible switching between superhydrophobicity and superhydrophilicity after being annealed and modified alternatively, with a fast the wetting switching process costing only 16 min for each cycle. Moreover, polarization curves measurements demonstrate that the superhydrophobic Zinc surface has good anticorrosion properties that can provide greater protection for the bare steel substrate. It is believed that an effective, rapid and eco-friendly approach has been invented to prepare large-area superhydrophobic surface, which shows reversible wettability switching and anticorrosion on the steel substrate for great potential applications, and easily extended to other metal substrates.

Superhydrophobic surfaces on brass substrates fabricated via micro-etching and a growth process

“…The peak at 535.5 eV is usually assigned to chemisorbed or adsorbed oxygen species such as O 2 , H 2 O, and ZnO(OH) because of surface hydroxyl groups. 33 The peak located at 530.8 eV is due to the O 2À in Zn-O, and this demonstrates that the STA molecules reacted with the -OH groups of the Zn. The C 1s high-resolution spectrum is shown in Fig.…”

Fabrication of Poly(o/m-Toluidine)–SiC/Zinc Bilayer Coatings and Evaluation of Their Corrosion Resistances

“…However, an excellent coating must be defect free and compact enough to endure the attack of a corrosive environment [2]. Zn coatings contain some concave-convex structure, which seriously affects its corrosion protection [3]. The presence of different types of inorganic nanoparticles in the zinc matrix has been reported to increase the coating compactness and consequently improve the corrosion behavior of the Zn coating [4][5][6].…”

Super-Hydrophobic Co–Ni Coating with High Abrasion Resistance Prepared by Electrodeposition

“…From the obtained results, the R ct value of the super-hydrophobic Co-Ni coating is three orders of magnitude higher than that of carbon steel substrate. Generally, the inhibition efficiency (η) was computed with the equation as follows [35]: η(%) = (1 − R ctb /R ctc ) × 100%, where the R ctb and R ctc are the charge transfer resistance of bare carbon steel and the super-hydrophobic Co-Ni coating, respectively. Based on the values in Table 4, the inhibition efficiency of the as-deposited super-hydrophobic Co-Ni coating can be calculated as 99.3%, suggesting that the electrochemical charge transfer process of super-hydrophobic Co-Ni coating is very difficult to occur under the tested conditions.…”