Magnet-induced fabrication of a superhydrophobic surface on ZK60 magnesium alloy

In this work, magnetic Fe 3 O 4 nanoparticles treated with hexadecyltrimethoxysilane were used as immobilization material. Under the anchor of dopamine, the magnetic nanoparticles can be easily deposited on the solid substrate. Array structure was formed by the coated Fe 3 O 4 on the magnesium alloy with the magnet-induced assembly technique. The hierarchical rough surfaces on the substrates form a superhydrophobic coating with a water contact angle as high as 157°. Of note is that the coating significantly decreased the corrosion rate compared with the pristine magnesium alloy in 3.5   wt.% NaCl solution.