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Droplet bouncing on special wettability surface is common and important in daily life and engineering applications (anti‐icing and drag reduction, etc.). However, there are few studies on the multiple droplets impact and there is a lack of systematic research on the interaction of oscillation and bounce. Here, the impact and oscillation of multiple droplets on the porous superhydrophobic bionic lotus surface are studied by a high‐speed camera system. On the bionic lotus surface (Surf‐1), an impacting droplet can merge another larger sessile droplet and bounce off. Comparing with single droplet impact, it is suggested that multiple droplets impact make more efficient use of the air cushion on the micrometer‐nanometer‐scale binary structure (MNBS) and show the self‐cleaning performance of Surf‐1 better. Moreover, with the theory for damped harmonic oscillators, it is found that Surf‐1 can prolong the oscillation of droplets (last >250 ms) and slow down the attenuation of energy. The energy can be efficiently recycled to the bounce by shortening the droplet impact interval (ti). The fundamental understanding of multiple droplets impact and the reclamation of oscillating energy are beneficial for scientific design of new surface and engineering applications. [ABSTRACT FROM AUTHOR]

A novel ion implantation and Al/AlN/CrAlN/CrN/MoS2 gradient duplex coating was used to improve the wear-corrosion synergy performance of AM60 magnesium alloy. The wear and corrosion behaviors of the as-deposited gradient duplex coating were subsequently investigated. The results showed that the gradient duplex coating has excellent wear resistance with the wear rate of 2.31 × 10−6 mm3/Nm, which is far below compared to that of the uncoated magnesium alloy of about 3.15 × 10−4 mm3/Nm. The introduction of intermediate layers between the top MoS2 layer and magnesium alloy substrate remarkably improved the magnesium alloy's load bearing capacity. The hardness and modulus of the Al/AlN/CrAlN/CrN intermediate layer was 20 and 7 times larger than that of the uncoated magnesium alloy, respectively. In addition, the corrosion resistance of the magnesium alloy with the gradient duplex coating was also enhanced with the corrosion current density, which decreased from 1.25 × 10−5 A/cm2 to 6.19 × 10−7 A/cm2. The present work provided a feasible strategy to fabricate wear-corrosion resistant coating via component and structure gradient design. [ABSTRACT FROM AUTHOR]

The data presented in this article are related to the research article entitled "Controllable construction of ZnWO 4 nanostructure with enhanced performance for photosensitized Cr(VI) reduction"[1] published in Applied Surface Science. The data of SEM/TEM given in this manuscript shown the effect of the hydrothermal time on the morphology of zinc tungstate samples. The photocatalytic degradation activity of methyl orange (MO) over ZnWO 4 nanorods obtained after 14 h hydrothermal process was investigated.