Fabrication of a Superhydrophobic SiO2 Coating with Anticorrosive Protection

Abstract In this work, the carbon steel matrix obtained a silane coupling agent (KH550) modified rough SiO 2 coating, covering it by dip‐coating method. The modified SiO 2 (K‐SiO 2 ) coating on the carbon steel was coated with stearic acid (STA) and adjusted the proportion of SiO 2 nanoparticles and KH550 to achieve the more perfect superhydrophobic sample. It turns out that SiO 2 particles were evenly disturbuted and linked together by KH550 to form a stable structure. The K‐SiO 2 coating liquid was further added a modifier of STA to achieve low surface energy, and then developed a durable and corrosion resistant coating. The superhydrophobic coating liquid was coated on the carbon steel to obtain a multifunctional superhydrophobic coating (contact angle=163°, rolling angle=1.4°), having excellent self‐cleaning, adhension, durability and corrosion resistance.