Fabrication of a robust slippery liquid infused porous surface on Q235 carbon steel for inhibiting microbiologically influenced corrosion

Improving the mechanical stability and oil stability of slippery liquid infused porous surface (SLIPS) is very urgent to its long-term application in preventing bacteria settlement and mitigating the following microbiologically influenced corrosion (MIC) for metallic material in marine environment. Herein, a robust superhydrophobic surface was first fabricated through spraying SiO 2 nanoparticles on the natural resin shellac adhesive. The superhydrophobic surface could retain superhydrophobicity after 160 sandpaper abrasion cycles (abrasive length of 64 m), which was attributed to the strong binding force between SiO 2 nanoparticles and shellac via hydrogen bonding . Thus, a robust SLIPS was fabricated through infusing lubricant oil into abrasion-resistant superhydrophobic surface. And the fabricated slippery surface exhibited stable slippery performance after spin treatment and damaged by a scratch. Furthermore, scanning kelvin probe (SKP) test verified the scratch was able to heal through the self-healing performance of lubricant oil. Finally, the bacterial settlement and electrochemical experiment results indicated the SLIPS could effectively mitigate sulfate reducing bacteria (SRB) settlement and following MIC after immersing in SRB solution for 14 days. This facile method provides a guidance to fabricate robust slippery surface for its long term application.