The corrosion of
metal materials is detrimental to petroleum pipelines,
marine ships, heat exchangers, etc. To date, existing technologies
have focused on improving corrosion resistances, such as anodization
and painting. Superhydrophobic surfaces, which can retain air gaps
between the corrosive liquids and solid structures, have shown effective
corrosion prevention, but the inherent material property is not corrosion
resistant. Herein, we reported a novel superhydrophobic surface with
excellent corrosion resistance by using an electroplating method.
The superhydrophobic surface consists of Zn–Ni and Zn–Co
alloys, which are inherently corrosion resistant. We compared such
a newly developed surface with superhydrophobic NiO/ZnO and ZnO coatings,
respectively. The water contact angle of the novel superhydrophobic
coating was larger than 150° after immersion into a NaCl solution
for 48 h, while the other two coatings lost the superhydrophobicity.
Furthermore, electrochemical measurement results demonstrated that
our newly developed superhydrophobic coating exhibited the highest
corrosion potential (−0.777 V) and lowest corrosion density
(1.905 × 10–6 A cm–2). We
envision that the inherently anticorrosion superhydrophobic coating
can effectively prevent the corrosion of industrial metals.
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