How surface orientation affects coalescence-induced droplet jumping behavior and subsequent atmospheric corrosion resistance of a superhydrophobic surface?

In this study, the effect of the surface orientation on the coalescence-induced droplet jumping behavior (CIDJB) and the subsequent atmospheric corrosion resistance of the knife-like structure CuO superhydrophobic surface were studied. And the corresponding atmospheric corrosion protection mechanism on the basis of the CIDJB was revealed. The results indicate that the horizontally oriented superhydrophobic surface exhibits a bigger droplet size distribution and surface coverage during the condensation process because of the droplets falling back to the surface. And compared with the vertically oriented superhydrophobic surface, the horizontally oriented superhydrophobic surface exhibits a better corrosion resistance after condensation. • The effect of surface orientation on droplet jumping behavior was studied. • The effect of surface orientation on atmospheric corrosion resistance was studied. • The corresponding atmospheric corrosion protection mechanism was revealed.