Mechanically durable, superhydrophobic coatings prepared by dual-layer method for anti-corrosion and self-cleaning

Abstract

Superhydrophobic materials have gathered great attention due to its great commercial potential. However, the low stability of coatings is a major challenge for applications. Here, a superhydrophobic coating with mechanical stability and corrosion resistance was obtained by using spray-coating method. We combine micro-scale roughness with low surface energy (18.5 mNm-1) to create a durable hierarchical structure with critical transition pressure of 570 Pa. Interestingly, the as-prepared superhydrophobic coating exhibited good mechanical stability and corrosion resistance. Importantly, various substrates could be used for spray coating. When applied superhydrophobic coating on copper surface, corrosion resistance property was achieved. The present study provides a simple method to produce multifunctional surface.