Advanced Anticorrosive Coatings Prepared from the Mimicked Xanthosoma Sagittifolium-leaf-like Electroactive Epoxy with Synergistic Effects of Superhydrophobicity and Redox Catalytic Capability

Abstract

Novel anticorrosion coating materials were prepared by replicating fresh plant leaves; these materials had a synergistic effect of superhydrophobicity and redox catalytic capability. Superhydrophobic electroactive epoxy (SEE) coating applied for corrosion protection was prepared and coated on the surface of cold-rolled steel (CRS) using a nanocasting technique from the surface structure of fresh Xanthosoma sagittifolium leaves. First, the transparent PDMS template was replicated from the surface structure of fresh Xanthosoma sagittifolium. Subsequently, the SEE coating was fabricated on the CRS electrode using a nanocasting technique with a transparent PDMS template and an electroactive-epoxy polymer solution as the ink. The CRS electrode coated with SEE was found to have a water contact angle (CA) of 153°, which was significantly higher than the smooth electroactive epoxy (EE) coated on the CRS by spin coating (CA = 81°). The SEE coating material not only shows superior water repellent properties but also has electroactive properties. It should be noted that the CRS coated with SEE was found to exhibit remarkably enhanced corrosion protection as compared to the corresponding CRS coated with a smooth counterpart, on the basis of a series of electrochemical corrosion measurements performed under saline conditions.

Superhydrophobic surfaces for corrosion protection: a review of recent progresses and future directions

“…9). [94][95][96][97] Compared to flat coating, the microstructured coating exhibits improved barrier performance against water thanks to the inclusion of air within the microstructures, thereby improving the protection capability of layer for metal substrate. In addition, nanoparticles, such as clays 98 or graphene, 99 have been incorporated to these coatings to decrease oxygen permeability.…”

Research progress of biomimetic superhydrophobic surface characteristics, fabrication, and application

“…At present, the cost of measures of anti-corrosion of metal, such as sacrificial anode, external power to change the potential distribution of metals, antirust paint, and others is high and can only delay corrosion and cannot fundamentally solve the problem. The superhydrophobic surface has the property of water resistance, which can block the contact between the water and the metal material to relieve the oxidation corrosion problem, 32 as shown in Figure 14. The surface ships on the low-latitude sea are easy to freeze after the waves on the deck and, finally, the ice covers on the surface of the ship.…”

“…SEM images of (a) EE coated on CRS and (b) SEE coated on CRS. 32 weapons systems, and other exposed equipment to avoid salt fog corrosion but also can save the time and money spent on maintenance due to corrosion.…”

Superhydrophobic Conducting Polymers Based on Hydrocarbon Poly(3,4‐Ethylenedioxyselenophene)

“…The elaboration of surfaces with superhydrophobic properties is a field of research highly in demand due to the various potential applications of these materials, such as in self-cleaning coatings, [1] anti-corrosion, [2] anti-fogging, [3] anti-icing, [4] antifouling, [5] anti-bacterial materials, [6] optical devices, [7] sensors, [8] membranes, [9] for energy transfer, [10] or microfluidics. [11] Such properties are often obtained by biomimetic approaches [12][13][14][15] combining low-surface-energy materials with surface microand/or nanostructuration.…”