Slippery Liquid-Infused Porous Surface with Layered Double Hydroxides for Enhanced Corrosion and Wear Resistance of TC4 Alloys

• • The ZnAl LDH coating with molybdate intercalation and PDMS infusion achieved a corrosion current density of 2.34×10−7 A/cm2, indicating a significant reduction in corrosion rate compared to bare TC4, which is critical for long-term durability in marine environments. • • The nanoporous LDH structure provides a physical confinement effect that limits PDMS lubricant loss, enhancing wear resistance; this is essential for moving components in orthopedic implants and marine machinery where lubricant depletion leads to failure. • • UV-grafted PDMS chains chemically bond to hydroxyl groups on LDH, reducing lubricant depletion and ensuring sustained hydrophobicity and corrosion protection over extended operational periods. • • The synergistic effect of LDH nanosheets and infused silicone oil improves wear performance, addressing the adhesive wear issue of TC4 alloys, which is a bottleneck for their use in high-friction applications.