Laser processed bionic super-slippery surfaces toward the electricity generation through low-adhesion sliding of magnetofluid achieving corrosion resistance of marine metals

Abstract

Marine engineering facilities are perpetually exposed to the harsh corrosive conditions of high salinity and humidity, where traditional corrosion resistance technologies often grapple with the challenge of limited energy supply. This study innovatively integrates bionic super-slippery surface technology with magnetofluid power generation to develop a novel self-powered corrosion resistance system. By employing laser texture processing to construct hierarchical microstructures on metal substrates and infusing them with lubricating fluids, a super-slippery surface with a contact angle exceeding 150° and a sliding angle below 3° was successfully fabricated. This surface demonstrates exceptional magnetofluid repulsion properties, significantly reducing residual liquid retention compared to conventional surfaces, thereby effectively addressing the energy loss issues caused by solid/liquid adhesion in traditional magnetofluid power generation. When applied to marine buoy corrosion resistance, the super-slippery surface leverages its low-adhesion to harness wave motion, driving continuous magnetofluid power generation to supply a stable current for cathodic protection systems. The generated current maintains the metal surface at a lower potential, reducing the corrosion rate by over 50 %. This research not only pioneers a new application pathway for super-slippery surfaces in the energy sector but also offers an innovative solution for marine energy exploitation and the protection of metal materials in marine environments.