Rational design of PDMS/paraffin infused surface with enhanced corrosion resistance and interface erosion mechanism

Metal corrosion is a headache in marine industry. The existing technologies can hardly provide an effective long-term corrosion protection. Biomimetic slippery lubricant infused porous surface (SLIPS) has been developed as a potential alternative technique to resolve this problem. Herein, a stable triplelayered slippery surface which consist of compact-nickel-underlayer/porous-nickel-midlayer/PDMS/par affin infused toplayer was designed and developed for corrosion protection. This composite surface exhibited a low sliding angle with good stability and thermal assitant self-healing property. Simultaneously, it demonstrated good anti-corrosion property with an extremly low corrosion current density and a large impedance of 2.301 x 10(7) Omega.cm(-2), the as-prepared sample even can provide efficient corrosion protection for a long-term immersion in NaCl solution. Furthermore, the interface erosion mechanism was studied via the assistance of electrochemical and surface analysis techniques. The results revealed that no corrosion products were generated which further proved the good anti-corrosion performance. We believe that this triple-layered slippery surface can broaden the application of metals in the field of marine and other industries. (C) 2022 The Authors. Published by Elsevier Ltd.

Automated summary

In this study, a stable triple-layered slippery surface was designed and developed for corrosion protection of metals. The surface exhibited good sliding performance, stability, and long-term anti-corrosion protection without corrosion product generation. This triple-layered slippery surface has the potential to be widely applied in the marine and other industries.