We present a simple method for fabricating the superhydrophobic coatings on composite silicone rubber used for electrical outdoor applications. The coating is characterized by contact angles as high as 170° and is mechanically durable in contact with the aqueous phase. We discuss the impact of mechanical durability of the surface texture on the anti-icing performance of the coating on the basis of the experimental data on freezing delay of sessile aqueous droplets. A set of complementary data obtained in laboratory and outdoor experiments on freezing delay time, variation of wettability and practical work of adhesion for supercooled aqueous sessile droplets, impacting behavior of droplets at low negative temperatures, as well as the results of snow and ice accumulation in outdoor experiments indicate the very prospective icephobic properties of the developed coating.

anions such as chloride ions. [1,2,[4][5][6][7] This can compromise using bare copper and its alloys in technology because corrosion of copper impacts its performance in industrial and technological applications.Several ways for enhancing the corrosion protection were discussed in the literature, including the formation of thick oxide films [3,8,9] and the formation of a superhydrophobic layer atop of bulk copper. [10][11][12][13][14][15][16][17][18][19] As for oxide films on copper and copper alloys, typically the ionic state of copper can be either monovalent or divalent, associated with the formation of cuprous oxide Cu 2 O or cupric oxide CuO, respectively. In many cases, such as high temperature or anodic oxidation, the dual oxide phase formation takes place, with CuO occupying the outer and Cu 2 O the inner layers. [8,9,20,21] Such complex oxide layer has been found to be useful in improving the corrosion resistance of copper in NaCl solutions, [1,2,8,22] while the formation of a compact thick film of CuO on Cu surface prevents anodic corrosion. [23] The superhydrophobic films on metal surfaces essentially inhibit the electrochemical corrosion processes due to several protection mechanisms, such as electrolyte repellency, suppression of adsorption of aggressive ions onto the surface, barrier effect of the modified textured surface layer, and specific charging of a hydrophobic surface in electrolytes. [24,25] At the same time, for the majority of designed superhydrophobic coatings, a poor abrasive resistance restricts the practical application of these coatings. However, it was shown recently [26] that a strategy, combining the laser chemical modification of metal's surface layer and laser texturing, followed by chemisorption of low energy compounds, can be effectively used to control the mechanical and chemical properties of a superhydrophobic layer on aluminum substrate.In this study, we will demonstrate that the coatings with enhanced protective properties based on multibarrier principle can be designed on copper using the above strategy. We will show that nanosecond laser treatment in an oxygen atmosphere under appropriate laser texturing regimes followed by chemisorption of fluorooxysilane allows obtaining a thick layer of cupric oxide CuO with crystalline micro-and nanotexture and superhydrophobic properties. Triple layer copper oxide structure designed in that way allows solving the problem of durable polyfunctionality of superhydrophobic coatings. We will present Copper and its alloys are among the most used metals for the industry. However, using bare copper and its alloys in technology is compromised because corrosion and poor abrasion resistance of copper impacts its performance in industrial and technological applications. In this paper, a strategy based on combining the laser chemical modification of metal's surface in a controlled atmosphere and laser texturing, followed by chemisorption of low energy compounds is effectively used for fabrication of a superhydrophobic coating with enhanced prot...

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Fabrication of superhydrophobic coatings for magnesium alloys is in high demand for various industrial applications. Such coatings not only extend the service life of metal structures, but also impart additional useful functional properties to the coated surface. In this study, we show that nanosecond laser processing of long, thin stripes of magnesium alloys followed by the deposition of a hydrophobic agent onto the magnesium oxide layer is a simple, convenient, and easily reproducible method for obtaining superhydrophobic surfaces with property gradient along the sample. The mechanism of the gradient in wettability and electrochemical properties of the magnesium alloy surface is discussed based on the high-temperature growth of magnesium oxide and its following degradation. The latter is related to the development of internal stresses and the formation of cracks and pores within the oxide layer at prolonged exposure to high temperatures during the interaction of a laser beam with the substrate. The effect of heating during laser processing of magnesium materials with limited sizes on the protective properties of the forming coatings is elucidated.

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