Corrosion Resistance and Durability of Superhydrophobic Surface Formed on Magnesium Alloy Coated with Nanostructured Cerium Oxide Film and Fluoroalkylsilane Molecules in Corrosive NaCl Aqueous Solution

Abstract

The corrosion resistant performance and durability of the superhydrophobic surface on magnesium alloy coated with nanostructured cerium oxide film and fluoroalkylsilane molecules in corrosive NaCl aqueous solution were investigated using electrochemical and contact angle measurements. The durability of the superhydrophobic surface in corrosive 5 wt% NaCl aqueous solution was elucidated. The corrosion resistant performance of the superhydrophobic surface formed on magnesium alloy was estimated by electrochemical impedance spectroscopy (EIS) measurements. The EIS measurements and appropriate equivalent circuit models revealed that the superhydrophobic surface considerably improved the corrosion resistant performance of magnesium alloy AZ31. American Society for Testing and Materials (ASTM) standard D 3359-02 cross cut tape test was performed to investigate the adhesion of the superhydrophobic film to the magnesium alloy surface. The corrosion formation mechanism of the superhydrophobic surface formed on the magnesium alloy was also proposed.

Role of surface oxygen-to-metal ratio on the wettability of rare-earth oxides

“…[1][2][3][4][5] There has been considerable focus on understanding their wettability 6,7 and developing them for a wide range of applications including droplet impact resistance, [8][9][10][11][12][13] anti-icing, [14][15][16][17][18][19] dropwise condensation, [20][21][22][23][24] electro-wetting, 25,26 drag reduction, [27][28][29][30][31][32] evaporation, 33,34 and anti-corrosion. [35][36][37][38] An important challenge for broad applicability of these hydrophobic materials is their limited robustness. 3,4,39 Most approaches for fabricating superhydrophobic surfaces involve texturing a polymeric hydrophobic material or coating a textured hydrophilic material with a polymeric hydrophobic modifier such as organosilanes or thiols.…”

Development of nano-structured icephobic surfaces based on plasma polymerization /

“…Furthermore, their results show that a superhydrophobic coating can lead to at most a 300% reduction in the corrosion current density of an aluminum surface compared to an untreated aluminum surface. Ishizaki et al [100] also showed that the corrosion current density of a superhydrophobic surface was decreased by more than one order of magnitude as compared to that of the uncoated one. These results indicate that the superhydrophobic film has good corrosion resistance.…”

“…In order to simulate the influence of rainwater on a superhydrophobic coating, the surfaces are immersed in various pH solutions [95,97,[100][101][102][103][104][105]. Momen et al [95] studied the stability of the surfaces spray-coated with silicone rubber/ZnO/SiC>2 composites after immersion in different pHs (4, 6, 7 and 10) in order to simulate rainwater conditions.…”

“…Nowadays, the protective corrosion of metal special aluminum is an important topic in research. Several studies showed that superhydrophobic coatings lead to an increase in the corrosion resistance of surfaces [100,101,106,108].…”

Corrosion resistance of BIS 2062-grade steel coated with nano-metal-oxide mixtures of iron, cerium, and titanium in the marine environment

“…Nano-sized cerium oxide incorporated in nickel, aluminium, and magnesium matrices improved the corrosion resistance and wear resistance (Arurault et al 2004;Low et al 2006;Chandrasekar and Pushpavanam 2008;Xue et al 2010). A recent report showed the development of super-hydrophobic surface of magnesium alloys and aluminium alloys using nano-cerium-oxide thin films (Ishizaki et al 2011;Liang et al 2013). The commonly employed method to prevent corrosion in mild steel is to provide a permanent impermeable coating.…”