This review provides an overview of recent advances in the application of superhydrophobic surfaces to act as corrosion barriers. The adverse consequences of corrosion are a serious and widespread problem resulting in industrial plant shutdowns, waste of valuable resources, reduction in efficiency, loss or contamination of products, and damage to the environment. Superhydrophobic surfaces, inspired by nature, can be considered as an alternative means for improving the protection of metals against corrosion. Due to the possibility of minimizing the contact area between liquids and a surface, superhydrophobic surfaces can offer great resistance to corrosion. Artificial superhydrophobic surfaces have been developed with the potential of being applied in numerous settings including self-cleaning, anti-icing, oil-water separation, and especially anti-corrosion applications. In this paper, we review the concept of superhydrophobicity through presentation of different theoretical models. The fabrication and application of superhydrophobic surfaces are presented, and we then discuss the use of superhydrophobic coatings as barriers against the corrosion of metals.

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Application of superhydrophobic coatings as a corrosion barrier : a review

Biomimetic slippery liquid-infused porous surfaces (SLIPSs) are developed as a potential alternative to superhydrophobic surfaces (SHSs) to resolve the issues of poor durability in corrosion protection and susceptibility to frosting. Herein, we fabricated a double-layered SLIPS coating on the AZ31 Mg alloy for corrosion protection and anti-icing application. The porous top layer was infused by lubricant, and the compact underlayer was utilized as a corrosion barrier. The water-repellent SLIPS coating exhibits a small sliding angle and durable corrosion resistance compared with the SHS coating. Moreover, the SLIPS coating delivers durable anti-icing performance for the Mg alloy substrate, which is obviously superior to the SHS coating. Multiple barriers in the SLIPS coating, including the infused water-repellent lubricant, the self-assembled monolayers coated porous top layer, and the compact layered double hydroxide–carbonate composite underlayer, are suggested as being responsible for the enhanced corros...

Robust Slippery Coating with Superior Corrosion Resistance and Anti-Icing Performance for AZ31B Mg Alloy Protection.

Comparison of barrier properties for a superhydrophobic epoxy coating under different simulated corrosion environments

Recent development in the fabrication of self-healing superhydrophobic surfaces

Slippery liquid-infused porous surface (SLIPS) with superior liquid repellency, anti-corrosion, anti-icing and intensified durability for protecting substrates

Researching a highly anti-corrosion superhydrophobic film fabricated on AZ91D magnesium alloy and its anti-bacteria adhesion effect

A promising pretreatment method for reducing the electrochemical activity of the magnesium alloy matrix beneath coatings is reported. The physiological stabilization process takes advantage of the localized micro-galvanic corrosion for transforming regions with high activity into a physiological stabilization layer, which can be converted into a protective coating by hydrothermal treatment. Electrochemical and immersion tests revealed that the corrosion resistance of treated AZ91D magnesium alloy was improved. In the cell viability test, the physiological stabilization-hydrothermal samples showed good cell viability for human embryonic kidney (HEK) 293 cells.

Yan Liu

Papers

Researching a highly anti-corrosion superhydrophobic film fabricated on AZ91D magnesium alloy and its anti-bacteria adhesion effect

Effect of the physiological stabilization process on the corrosion behaviour and surface biocompatibility of AZ91D magnesium alloy