Facile fabrication of biomimetic liquid-infused slippery surface on carbon steel and its self-cleaning, anti-corrosion, anti-frosting and tribological properties

摘要

Herein, facile and commercial nanosecond laser treatment was utilized to fabricate biomimetic liquid-infused slippery surface on carbon steel, and its self-cleaning, anti-corrosion, anti-frosting and tribological properties were systematically analyzed. The SEM and three-dimensional morphology analysis results revealed that the laser treatment was effective in producing extreme rough, porous and multilevel surface morphology on steel substrate. After fluorination process and subsequent oil infusion, slippery surface was successfully created. Through wetting analysis, it was found that as-prepared slippery surface showed hydrophobic property with a low contact angle hysteresis, indicating that a uniform and smooth oil layer had been created. Owing to its excellent anti-wetting and insulator effects to liquid medium, slippery surface was proven to behave superior self-cleaning and anti-corrosion performances. Furthermore, slippery surface could also effectively postpone the moisture condensation, which hence endowed steel substrate with enhanced anti-frosting property. Compared with base steel, slippery surface also showed improved friction-reducing and anti-wear performances due to the lubricating effect of oil layer. Based on these results, it could expect that the prepared slippery surface is promising to expand the practical application of traditional carbon steel materials.