Durable, superhydrophobic, superoleophobic and corrosion resistant coating on the stainless steel surface using a scalable method

In this study, superamphiphobic coating was produced using low surface energy materials and fabrication of hierarchical structures on stainless steel surface. Hierarchical structure was fabricated by silica multilayer coatings and adequate control of particles size in each layer. The surface energy was decreased by fluoropolymer compounds. The maximum static contact angle of DI water, ethylene glycol and fuel oil droplets on the prepared surface increased from 64° to 166°, from 33° to 157° and from 0° to 116°, respectively. Also, the minimum sliding angles of DI water, ethylene glycol and fuel oil droplets on the prepared surface were less than 2°, 5° and 12°, respectively. These results confirmed the superhydrophobicity and superoleophobicity of coated surfaces. These films maintained their superamphiphobicity after 16 days of immersion in water. In electrochemical corrosion evaluation, the highest protection efficiency of fabricated films reached as high as 97.33%. These satisfied results confirmed that this simple method can be used to fabricate large scale samples.