▎ 摘　　要

NOVELTY - Titanium alloy surface micro-nanoparticle composite conductive enhancement structure comprises micron-scale particles, nanoscale particles and titanium alloy matrix. The micron-scale particles are embedded on surface of titanium alloy matrix. The nanoscale particles are dispersed on surface layer of titanium alloy matrix. USE - Titanium alloy surface micro-nanoparticle composite conductive reinforced structure. ADVANTAGE - The structure solves the contradiction of corrosion resistance and conductive performance of fuel cell metal plate material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a micro-nanoparticle composite conductive enhancement structure on the surface of a titanium alloy, which involves: (A) pickling titanium alloy substrate I to remove surface oxide layer; (B) imprinting prefabricated micron-scale pits on titanium alloy substrate I to obtain titanium alloy substrate II; (C) performing acid etching treatment on titanium alloy substrate II to obtain substrate III with nano-holes on surface; (D) performing ultrasonic vibration to make micron particles IV fall into pits of substrate III; (E) depositing nanoparticles V on surface of substrate III in gas or liquid phase; and (F) thermally diffusing micro-particle IV, nano-particle V and substrate III by hot rolling method to obtain substrate VI with surface composite micro-nanostructure.