The research on preparation of superhydrophobic surfaces of pure copper by hydrothermal method and its corrosion resistance

In this paper, a novel method combining etching and hydrothermal treatment was used to design the superhydrophobic surface on the copper substrates. The contact angle of the superhydrophobic surface was 157.7 ± 1°. The superhydrophobic surface showed the corrosion inhibition efficiency of 99.81% in 3.5 wt% NaCl aqueous solution. Besides, the superhydrophobic surface showed a good stability in simulated seawater and humid air. In addition, the formation mechanism of copper superhydrophobic surface was analyzed based on the results of SEM, XRD and XPS.