novel method to fabricate water-soluble hydrophobic agent and super-hydrophobic film on pretreated metals

This paper demonstrated a convenient method to prepare water-soluble hydrophobic agent and create super-hydrophobic film on the basic material of phosphating film and electroless Ni–P composite coating on carbon steels. Water contact angles and rolling angles of superhydrophobic films were 155–1688 and 2–38 on phosphating films, respectively, 145–1558 and 15–208 on electroless Ni–P composite coatings, respectively. This water-soluble hydrophobic agent was white latex and had lots of micro-particles suspending in it. The thickness of the singlelayer super-hydrophobic film with good corrosion resistance and stability was about 2–3 mm. The microstructure of super-hydrophobic film was discussed using XRD, EDS, optical and electronic microscope as analytical methods. This kind of super-hydrophobic film had a great many microparticles dispersing in the surface, which contained F and Si and greatly increased the roughness of the surface