Corrosion of One-Step Superhydrophobic Stainless-Steel Thermal Spray Coatings

Abstract

As most superhydrophobic coatings are made of soft material, the need for harder, more robust films is evident in applications where erosional degradation is of concern. The work herein describes a methodology to produce superhydrophobic stainless steel thermal spray coatings using the high-velocity oxygen fuel technique. Due to the use of kerosene fuel source, a carbon rich film is formed on the surface of the thermal spray coatings, lowering the surface

Targeting Pathogenic Biofilms: Newly Developed Superhydrophobic Coating Favors a Host-Compatible Microbial Profile on the Titanium Surface

“…Among few existing one-step techniques able to create superhydrophobic coatings, picosecond laser texturing has been used on the Ti6Al4V alloy surface, and although reduced Escherichia coli initial adhesion was noted, it did not reduce further the microbial attachment, which may suggest a questionable anti-biofilm property in a long-term effect . Recently, a promising new superhydrophobic coating was developed and replicated by others but only for stainless steel materials. , …”

“…24 Recently, a promising new superhydrophobic coating was developed and replicated by others but only for stainless steel materials. 25,26 Besides reducing bacterial adhesion, 21,27 superhydrophobic surfaces have been shown to improve corrosion resistance and increase mechanical and thermal-stress strength, 21,27 even though cytotoxicity is still a problem. 12 The microbiological effect of superhydrophobic treatments on the Ti surface has been demonstrated only for specific bacterial species (such as Staphylococcus aureus and E. coli) and has been studied mainly during the process of initial biofilm formation.…”

Measuring changes in wettability and surface area during micro droplet corrosion measurements

“…Such hydrophobicity could be present due to the metal's inherent lower surface energy due to the formation of a lower energy oxide film, and/or contamination of the Cu surface from volatile organic compounds in comparison to the level of contamination on the Al alloy. [25][26][27] In fact, there will always be some sort of surface layer on metals, which masks their true surface energy while in any other environment other than in vacuum. Nonetheless, it has been previously documented that Cu portrays a higher WCA than Al, [28] reflecting similar results to what is reported here.…”

Enhanced Fuel Efficiency by Frictional Drag Reduction of Toy Boat Coated with Superhydrophobic Additives comprising Nickel Stearate and AlNiCo Nanoparticles

“…[2] Such a combination introduces the non-wettable phenomenon to any desired surfaces like glass, metal, wood, paper, fabrics, etc. Owing to this inspirational phenomenon, different research methods have been developed to create a robust non-wettable superhydrophobic surface such as spin coating, [3] spray coating, [4] imprinting, [5] templating, [6] lithography, [7] plasma treatment, [8] chemical vapor deposition, [9] electrospinning, [10] etc., during the past few decades. Tu et al, [11] developed the SH surface by spraying perfluoroalkyl methacrylic copolymer (PMC) suspended with TiO2 nanoparticles (Nps) over polydimethylsiloxane precoated wood substrate, in that the TiO2 Nps impart the essential roughness while the PMC provides LSE and binds the Nps together providing a robust coating.…”