Recent advances in corrosion resistant superhydrophobic coatings. ![]() Purity of the sacred lotus, or escape from contamination in biological surfaces. Characterization of water-repellent and corrosion-resistant superhydrophobic surfaces on galvanized steel. Application of superhydrophobic coatings as a corrosion barrier: A review. Superhydrophobic surface constructed on electrodeposited silica films by two-step method for corrosion protection of mild steel. Superhydrophobic Film on Hot-Dip Galvanized Steel with Corrosion Resistance and Self-Cleaning Properties. Functional and smart coatings for corrosion protection: A review of recent advances. Science and Engineering of Superhydrophobic Surfaces: Review of Corrosion Resistance, Chemical and Mechanical Stability. Enhanced performance of a green inorganic-based passive film on the batch hot-dip galvanized steel by organic additives. Electrochemical studies of the inhibition of the cathodic delamination of organically coated galvanised steel by thin conversion films. Application of scanning Kelvin probe to study the corrosion protection of chromated hot-dip galvanized steel. The authors declare no conflict of interest. This increase in surface roughness corresponds to an increase in CA. ![]() A higher density of surface features entraps air, which limits the liquid droplet’s ability to rest on the surface and permeate through to the underlying substrate. ![]() Increased surface roughness can impart functionality to the surface via hydrophobicity. The dense needle-like precipitate entraps more silicon dioxide and would provide a rougher surface, which could explain the increase in CA observed. Studying Figure 2b,c, the morphology is significantly altered when using IPA as a solvent compared to that of ethanol. The increase in CA recorded for formulation 2 can be attributed to the different surface morphology compared to that formed by samples immersed in formulation 1 or 3. The maximum CA recorded for each sample generally occurred after 360 min of immersion with 125° for formulation 1, 135° for formulation 2 and 125° for formulation 3. CA measurements for HDG steel samples immersed in formulations 1–3 for up to 360 min are shown in Figure 3.
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