## 1 Introduction  
Super-hydrobobicity is one of the highly required surface properties for several industrial applications for which specific surface properties are required (such as anti-corrosion, anti-icing, self-cleaning, or anti-bioadhesion applications) [1]. In this context, numerous methods have recently been suggested to design super-hydrophobic hierarchical surfaces inspired by nature [2, 3]. The super-hydrophobic surfaces represent an interesting approach to maximizing the resistance to corrosion of materials usually sensitive to corrosion degradation, particularly aluminum and its alloys, by the dint in their capacity to reduce the interaction between metallic surfaces and liquids [4, 5, 6]. However, the proposed approaches usually require complex synthesis processes and production technologies that are not easily scalable. Moreover, several methods used to elaborate superhydrophobic surfaces require chemicals that are unsafe to the environment and human health such as fluorinated compounds. Therefore, the optimization of a facile, inexpensive, and environmentally friendly experimental approach to create superhydrophobic surfaces is greatly desired. According to [PERSON] et al. [7], who studied different surface hydrophizing techniques, the selection of experimental parameters have a great effect on the surface properties and, thus, on the superhydrophobic behavior of the samples. In particular, [PERSON] et al. [8] observed that the chemical etching time has an important effect on the change in the wettability behavior of the aluminum surface from hydrophilic to hydrophobic. [PERSON] et al. [9] produced a superhydrophobic surface on an aluminum sample using a two-step process. First, the aluminum was hydrothermally treated to create a flower-like hierarchical structure. Afterward, the obtained surface was treated by lauric acid to reduce the surface free energy. In particular, some studies focused on the corrosion inhibition of superhydrophobic surfaces. Indeed, [PERSON] et al. [10] showed in their study of the corrosion behavior of a copper superhydrophobic surfaces that the resistance to corrosion of these surfaces increased by more than \(10^{2}\) times in a marine environment. Moreover, the superhydrophobic surfaces optimized by [PERSON] et al. [11] on 6061 Al alloy showed a corrosion resistance efficiency of about 76% compared to the hydrophobic surface. In addition, [PERSON] et al. [12] created a superhydrophobic surface with a water contact angle above 156 and a sliding angle of about 3\({}^{\circ}\) on an Al alloy characterized by a long-term corrosion resistance. On the other hand, several studies showed that the deposition of a self-assembled silane monolayer on the surface is an efficient strategy to reduce the surface energy and improve the surface hydrophobicity [11; 13; 14; 15; 16; 17]. The self-assembly is a convenient route to prepare well-defined and highly ordered monolayers [18; 19]. In contrast to ultrathin films made by chemical vapor deposition (CVD), and molecule beam epitaxy (MBE), self-assembled monolayers are highly oriented and can incorporate a wide range of groups both at the chain terminal and in the alkyl chain [20]. Moreover, thanks to their stable and dense structure, self-assembled monolayers have possible applications in wear protection, corrosion prevention, chemical and biochemical sensing, and the optical field. Among several self-assembled films, alkylsilane exhibits favorable properties such as mechanical and chemical stability thanks to the strong siloxane bondings [21; 22]. However, even if significant efforts have been carried out to elaborate superhydrophobic surfaces, the multi-step preparation and relatively high costs are still drawbacks for their wide use in industrial applications. Thus, further knowledge on manufacturing methods is required for the purpose of better understanding the relationship between the hierarchical structure and the wettability behavior of the surfaces to enhance the corrosion inhibition.